Cell C Fibre - No Support

I wanted to upgrade my Fibre package using the cell C Portal online, but got a error message "[Code: LE0005] Invalid coordinates specified for feasibility" so I logged a support ticket using the portal. Nobody attended to my support ticket for 5 days. After which I phoned in and instead of sorting the issue wanted to sell me a new 24 month contract. I asked them to cancel my contract as I was not interested in taking up a new contract, and they refused to put me in contact with the cancelations department. I have been a customer for the last 6 years and I pay on time each month. But my current package is more expensive compared to a new package with the exact same upload and download speeds at the exact same FNO