Being Forced onto a product/ Bad Service

I bought a new device from Cell C. I am happy with the device but to my disappointment, there are forcing me to take MIAassist product which is R45.00. I requested this to be cancelled, and according to my knowledge, I never agreed on it. Cell C informed me they cannot cancel it as it is already on the contract and therefore, they cannot cancel it. I am so disappointment with Cell C. This is the second time I will have to return their device for a simple issue that can be sorted out. Why am being forced to take MIAssist product since I do not have a car and on top of that, I am paying for my home insurance that covers all that. R45.00 is a lot money to people like me. I will never ever buy any product from Cell C. Their desperation sucks. Your cannot add an item on the sale that a customer does not want and tell a customer that she cannot cancel it before 3 months. Thank God I am still on the grace period of the device, will return it. It is so stupid of you CELL C to force a customer to the product and on top of that tell her that it cannot be cancelled before 3 months. Are you that desperate or it by force. SHAME ON YOU. I will continue to tell my friends in Facebook/ Twitter on your service is. Hopefully, some people will see how your company is like.