BAD SERVICE, CANCEL MY CONTRACT

Am very disappointed with Cell C customer service, I just signed a contract yesterday at 17:36 for a data and router, when I got home it never connected to the internet tried call your customer care department and they transfer me to Technical support but still the problem continues

Decided to take it back to Cell C boulders Midrand where I have signed my contract at and those two agents working there told me they cannot assist, I told them I want to cancel it and they say I can't I must take my router home and see what to do with it...I mean what the f*ck is that

Why should I continue paying for something that is useless and they have a nerve to say that I cannot cancel within 24 hours