Telkom-No service

We took Telkom wifi service about 8 months ago. We have been struggling with our wifi that is less than 3mbps on a 10meg line. We cannot watch anything. We called telkom services to report the problem. They send someone out in January and no feedback. We called in February again and they told me that the cables have been damaged by lightning and it will not be repaired. They gave me a option of wireless that needs fibre and there is no fibre in this area. One of the faults login agents told me the only option left is to cancel because Telkom wont be able to give us a service anymore. There is no other options. Why didn't they tell us this when we took the contract? We have been paying for a 10meg line that we cannot even use. And it wont even be refunded.