No service from cellc

I'm a Cell C customer, and boy can I say that they DEFINITELY DON'T deserve to be called no1 in the industry. I own a business and require my phone to make and receive calls at ALL times. Where I have sent numerous emails and went to my nearest branch to speak to the manager? No one can give me feedback or help with my problem. So my problem is this: from September I've been experiencing problems with them putting me on soft and hard lock. I've made numerous payments through the Cell C app, and they simply cannot allocate my payments? I don't understand how they can be so careless about this? I require urgent assistance in getting this sorted out as I cannot run a business without the use of my phone thats being switched on and off as per their feels or whatsoever. And I don't want to be told, again, from Cell c staff to just complain on Hello Peter. Very dissatisfied and also would like to cancel my contract, where they also said they cannot help me. Please assist