Contract Enquiry

I am extremely disappointed by your service why am I still being overcharged for my contract this is the second time this is happening to me I'm and no one seems to assist me. I just want to be debited the agreed amount and nothing more. I have been a client of yours for about 10 years if no one resolves this please send me what is owed on my contract and I will part ways with being a client of yours. Your service has be come extremely disgusting.