Cell C network - loosing business

Hello Peter We moved our business to Cell C and we are loosing so much business because of signal and need to phone 3-4 times to get thourgh. The last 2 day's we are struggle to send or receive emails. For business this is not the answer. We changed the contract from personal to business and still it goes down from our personal accounts. Please I need service - or the contracts needs to be cancelled.