Mabobo,
Nobody here can tell you what you should do, as only you can make that decision. People can advice you though, and then you will have to make up your mind based on that. All I'd like to say, is that if you want to resign from bassa, all you have to do is to inform pay services to stop the payment. There is no need for a resignation letter, unless you want to.
Good luck with your decision, and well done for voting NO.
Gg
I am BA cabin crew and this is my own viewpoint and not that of BA.