Sorry it took me a while to get the message about your issues and post a response here for you.
I worked for eBay for 6 1/2 years as a Top Seller Account Manager (and I'm a Powerseller/Top-Rated Seller myself as well), so I'm pretty well-versed on how things work on eBay. :)
I'm not sure why you've been having so much trouble getting in touch with eBay. I know for a fact that the 2 numbers Richelle initially gave you BOTH work completely fine and have been the 2 main Powerseller Support numbers for more than 10 years. I just called both numbers myself and they both work perfectly fine.
I've called eBay Customer Support many times, including recently, and I've never been required to put in a 5-digit extension number. Yes, that is certainly an option that is given to callers, but you're not required to put in any extension number to speak with someone in Powerseller/Stores Support, which is what the support team is known by these days.
All you need to do is ignore the prompt to put in an extension number and just stay on the line and/or select options from the various menus, ones which most closely match your question/concern, and your call will be answered as quickly as possible.
Of course, keep in mind that this is the BUSIEST season of the year for eBay, so it's natural that you might have to wait for a while or be put on hold for a while.
You indicated at one point that you DID in fact speak with someone at eBay a few times, but that nothing has been done to resolve your problem -- right?
What you may not understand is that it's not possible for anyone at eBay to change or modify an invoice after it has been issued, nor is it usually possible for anyone to stop the monthly billing system from charging your automatic payment method for the month, not to mention changing the amount that is charged, which has NEVER been possible, as far as I know.
Invoices are processed in batches of thousands at a time, and it's simply not possible to stop the process nor change the amount that is charged after invoices have been sent.
The best you can hope for is that any credits that are due you will be applied to your NEXT invoice. That may be the source of your confusion, and the reason why you believe nothing has been done to resolve the problem.
Have you checked your Seller Account Status page to see if any credits have been posted to your account? That would be the only place you would be able to see if the mistake has been corrected.
If no credits have been posted, do you know for sure that any credits or adjustments have been approved? Most eBay reps are only allowed to issue courtesy or other credits in very limited, restricted situations, and the amounts they can issue are also extremely limited.
Sylvie, I can imagine how frustrated you must be by this situation, and how urgent it may seem to you that the problem be corrected as soon as possible, but to be honest, for this type of issue during this time of year, a week and a half really isn't enough time to allow eBay to resolve this type of issue, especially considering that, as I said earlier, it's doubtful that anything can be done to change what happens with your current invoice.
Even if a credit or adjustment to your fees was deemed appropriate, 99.9% of eBay reps would still have to submit the request to their supervisors for approval, which by itself can sometimes take several days this time of year, given how busy the holiday season is.
So my suggestion is to try and put it out of your mind for AT LEAST another week -- continuing to contact eBay regarding the issue right now will most likely not help in any way, but could just prolong the entire process even further.
If possible, I suggest waiting until after Christmas to follow up with eBay if you still haven't seen the proper adjustment to your seller account.
Please feel free to send me a private message if you have any additional questions or concerns, or if there's anything else I can do to help.