delay on my ADSL line is 3000 ms

For approximately 1 months the telkom ADSL was running perfectly well. From a week until now it is terrible. I called telkom support and explained for them the situation that the delay is going up to 3000ms. They escalated to their support Ref 372CRK280416. Their support called after 2 days and said that they have moved me from a port optimized to a normal port.It worked for an hour and then the same issue happened again. I called them yesterday night and the support guy started telling me that i need to pay a fee for the support. If telkom cannot fix their delay why should i pay. I work a lot of time from home and i got the ADSL connection 4Mbps uncapped for that reason. Now i got given another Ref 332CRK020516 and am still waiting. I really appreciate that Telkom fixes their line once and for all and upskill their people.