Telkom charging me for service not received.

I have recently moved to new area, I had a 10mb uncapped line at previous house. I have moved my line to new house. After staying there for 3 months, I found out that the new area only supports 4mb lines. Telkom have continued to bill me for the 10mb line. <br> <br> When I found this out, I tried phoning Telkom about 8 times to downgrade my line. All 8 time I held on for more than 30min. Not coming thought to anybody. Once got through, and after explaining my situation, I was put on hold again for 30 min. <br> <br> This is unacceptable. I need this sorted ASAP.<br>