Mweb not fair when cancelling a product

I signed up for NORDVPN through MWEB but the service from NORDVPN was so bad that I removed the app from my phone as well as from my pc. I put in a cancellation for this peoduct and now MWEB wants me to pay a cancellation fee of R2500.00 or carry on with the contract for the remaining 11 months! I cannot see that it is fair to keep on paying for a product that is so bad, that it is unusable. The product slowed down my streaming so much that I could not watch anything on my pc. It is also unstable as well as not always connecting automatically