Taking extra money that was not discussed or agreed upon

I'm tired of all the extra charges that gets debited from my account when I move. They charged me R17250 when I cxl just to move to my new address and then debited me again R17250. I gave my 2 months notice and there was already a box here , so why all the extra charges. They penalize you for moving even though you are still staying with them. I sent them an email asking someone to phone me and told them what happened and that I will go to social media about this and yet I still don't get a call from them