Rain One - Incorrect billing and poor services

I have two Rain devices that I make use of, have been using these for the past 3 years. Today they sent me a bill that I queried as it was incorrect. They charged for services they never provided and neither did I request for services to be added. I am now trying to get a hold of their consultants to assist with no luck. If you want to avoid stress and need good client services, DO NOT MAKE USE OF THEM. Rather make use of a company that has good client services when required. They don't even deserve half a star. I have been waiting for someone to assist for more than 30min now. Do they know the cost of airtime in RSA? Unhappy client