Billing for No Service Rendered

I app**** for an adsl line and i was told i have to either convert my prepaid line to adsl which will take 2 days or get a new line that will take 4weeks. I opted for the conversion and paid R700 since i didn't want to wait 4weeks for adsl. They converted the pre-paid line to a normal line but my adsl was not working after 4weeks. I had major issues with my line and adsl for 3months and i contacted telkom for a technician every week and every week someone was suppose to come and resolve the issue. In that 3months i had to use a 3G card which cost me more than the monthly subscription i was going to pay Telkom.<br> The technician came out in November and managed to sort out the line but told me that Telkom will have to downgrade my line because i cannot get 10MB/s speed. I told him that is fine and he told me that he will put it on his report to them to downgrade. I also requested the downgrade to make sure it was done.<br> They never downgraded the line and even after i called in to complain about the Billing they charged me for 3months that i got 0.2MB/s connection and the line kept disconnecting every 10-15min they wanted me to pay full price. All they say is sorry and want full payment.