Unable to resolve High Latency

Im constanly experiencing high latency issues. It was resolved for a short while in December. Currently I'm experiencing high latency on my ADSL line again. Single to noise ration is fine, so the line seems to be fine the Telkom tech confirmed this. But I'm experiencing latency between ********** ms, making it a timeous process to navigate the internet etc. The latency disappear during the night and when I test it in the morning it is fine 30ms constantly. During the day it fails again and the high latency is back. I asked a Telkom tech regarding issues in the area and he explained to me that the exchange is congested and should be upgraded. "It is one of his problem areas". I'm tired of paying for a servcie I cant use and talking to people that want to reset my port. Did a Speed test today and my download speed is at 0.2Mbps(Modem sync at 2Mbps), tech worked on line two days ago. I need to know if Telkom will be able to give me a stable connection via the exchange in our area if not then I need to explore other services. Simple answer YES or NO.