Poor Service

I have endless problems with the billing. I cancelled my service as we were moving house (I have a reference). in the new house we waited 5 weeks for the reconnection, I still paid the account and was told we will be credited once installed. a month ago we did not have service again for 3 weeks due to cable problems again I was told I will be credited, nothing yet. last month I paid my account but this month it shows I am in arrears. upon phoning them I was told that I did not cancel my previous account so the payment went through to the old account so I must pay the amount again and then after a month I will be credited otherwise they will suspend my service. I am a teacher and cannot go into Telkom shops every day, I cannot pay this money and my account was paid so why can they not transfer the money over as the old account does not exist. they are so unprofessional and I know that I am not going to get this money back. no one is bothering to help me so please I don't know what to do and I cannot pay double again,