Completely outraged by the service!

Having purchased a tablet Cell C, under contract, I took it home and after a few days I realized the touch screen did not work. Having not used it at, I took it back to Cell C to have them resolve the issue. Note the tablet was in perfect outlook condition. They assured me they could fix the problem and I was told they would call me to pick it up. A few weeks later they called for a pick up, upon arrival I was shocked to see that the entire screen was completely cracked. The staff acted as if it was that way. After much banter they said they would fix it, now almost 5 months later, I still do not have the tablet but Cell C continually withdraws it's monthly contract fees from account! I am outraged with this company along with the *********** bunch of people working there. This problem needs to be resolved immediately. I refuse to pay for this and I demand my money back.