Taking advantage of clients

I currently have two data contracts with Telkom, last month I bought a once off free me boost 3gig bundle when I ran out, currently my monthly data was loaded and is depleting while the 3gig from last month is not accessible and expiring on the 14th I’ve been calling them 4 days in a row and telling me I can transfer, yesterday I called again cause I don’t seem to find that option to transfer and was told I can’t transfer and that the data will go to waste that’s R200 down the drain. I wanted a solution and was told the manager is busy on another call and will call me back in two hours and I’m still waiting. Telkom is really the worst, I need a solution and need my services terminated, it’s really sad how this company treats clients