Very very poor aftersales and signal problems

My complaint started 2 years ago when I complain of no signal at work. We phoned cell c and asked them to come and asses the problem as we have 30 staff members using cell c. As it's a police station the public also make use of the premises and they don't get proper signal. Currently I can phone but can't use my internet or use whatsapp. I have reported this numerous times but up to date the problem still exists. As soon as I enter my office my cell tell me to switch on data roaming. I never get this problem at home. Numerous times I have asked for the head office number to lodg my complaint but no luck. About 3 to 4 weeks ago I reported my problem to the Bluff cell c. I form was completed and I was told somebody would be sent to address the problem at work. So far again empty promises. At the moment I feel cell C is letting me down badly. What's the use if I pay for a service which I don't get as I'm most the time at work. I feel management should have phoned me but clearly they are hiding. I'LL ADVISE ANYBODY TO STAY AWAY FROM CELL C. IF YOU WANT NO SERVICE JOIN CELLC. IF YOU WANT HEADACHES AND FRUSTRATION JOIN CELL C. Cellc sounds like a political party. I wount say which 1. This is definitely my last year with cellc. Thank you so much for your poor service.