Telkom can't help me fix my problems

For the past 5 days i began to notice a drop in internet speed and reception consistency on both my phone and wireless router both on telkom contracts. I phoned in and was advised to simply take out my sim card and put it back in, i saw no point in this but did it anyway,which led to no difference, 3 days later i phone again as i used to get a download speed of 3mbps but now 0.10kbps , i was placed on hold for 20 minutes before hannging up the call in frustration. 4 days later (today) I've no internet and have to send this post via another isp. I have confirmed on my own that this problem is restricted to my area because as soon as i go just a few roads away from my house i am back up to speed with both my phone and router. This is a huge issue as i work from home and with this i can't do anything.<br> Absolutely terrible