DSL line keeps on dropping & speed is non existing

This is really so frustrating. The line is so unstable, more off than on and if it's on, the download speed is non existing. The download speeds go town to 0.06MB download speed. It keeps on dropping the line every 5 minutes. This problem is already 5 months old. Every time a call is getting logged, the call get closed and nothing is fixed.<br> In the last 5 months, I've logged numerous calls, Telkom keep on closing the call, saying that they reset the port and nothing was fixed. I've escalated online, without any feedback. Calls 1460CTK230315, 549CTK150615, 538CTK190615, 86CTK200615 and existing open call 7CTK061015 can be trace and looked at. <br> One engineer told me its congestion on the exchange, Nothing he can do? I've got this 4MB DSL line for more than 5 years and if TELKOM add to many people on the exchange, they should fix it, it should not influence this line. This is not acceptable and really poor service for a payed line, which is never in proper working condition. Please can this be looked into urgently? This is really not expectable and the service from Telkom is not good. HHow can a paying customer get so poor service for 5 months and nothing is getting done?