I am so upset!!!

I’ve been a very loyal customer who do not even miss a single pay each and every month but however I want to cancel my contract with Telkom,my line was suspended from last week due to an amount of R37 that I don’t even know or told about I paid the money without hesitation now I have to call them each and every day for them to open my line I am told stories since last week yet they are able to send a bill for the month which I don’t even understand coz my line has been off..I would never recommend anyone to open a contract with them!!!