Nothing wrong with your English, better than my own, and English is my first language : )
It's a shame to see you leave us, but our money back assurance is genuine, and so long as you have sent through your request it will be processed.
The only other thing I would say is that while money may well be tight for you at this point, your membership was a lifetime membership, and while you may feel that you aren't getting quite what you need for the service at this point you may well find it extremely beneficial somewhere later on.
We don't see too many members leave us, but when I do see someone go I can't help think that it's an opportunity wasted for them, as SaleHoo is constantly changing and one of those changes by way of an addition to our services could be just what the member was looking for.
Anyway, good luck with your future ventures : )