Poor service

I used to be a fan but not anymore. I've been calling in, going to stores the works. No one can explain to me what's happening to my spending limit. It's says I've spend over r200 but no one can tell me what that money was spend on. I have given up. I don't know. This bill increases daily and no one seems to understand my query instead they telling me about my upgrade. Spend limit has nothing to do with an upgrade. I know this. Ive been a client since 2014 I'm sure. Honestly I'm done. This was my last time upgrading. You have lost a client that has been supporting you for over 5 years.