Bad internet connecting and no one to help

I have been with Telkom ADSL this year. My internet connection has been great up until the past 3 weeks. I primarily use my line for playing games in my own time. I have had no problem until the beginning of this month where i cannot even play online games in SOUTH AFRICA. My latency which is the time it takes to get a response from the server i am connecting to takes a constant 300-400ms to connect to Johannesburg. Simply, this is a joke. It takes the average connection 200ms to connect to a server in Europe yet double that for a place in the same country. Best of all i have phoned the Telkom service center twice and on both times the person speaking to me clearly does not understand what I am speaking about and keeps telling me my line is fine. This last conversation the person tells me that i need to pay extra for a package to lower my latency!!!! WHAT THE HELL IS THAT. For 5 months i have no problem now all of a sudden i need to pay more. Please find someone who can actually help people rather than waste peoples time. <br> P.S. I have a background in networking and programming so i do understand whats what