NO SIGNAL / NO NETWORK / NO INTEREST

My husband has THREE contracts with Cell C. The last 4 weeks NONE of the numbers work, the phone says no signal / out of network. After numerous calls to Cell C, a Facebook complaint etc, they promised to send someone 'to look' however the one agent did confirm that their tower is 1.3km away from us (useless information considering we have lived in the same place for 6 years and it always worked before), and the tower is "overloaded". So why take their debit order money of close to R1400-00 today BUT HE CAN'T USE WHAT HE IS PAYING FOR?? It makes NO sense! I'd like to warn other patrons against using Cell C in this matter because they clearly cannot handle the amount of customers they sign on. We would love to know how to get out of these contracts as it is just a waste of money - considering he was retrenched a year ago but still has to pay for this????