Negative impact on our business

We have been trying to get a line transferred for the past 2 months. My biggest issue is that no communication is taking place from this supplier, we never know what to expect and when to expect anything. after 6 weeks of waiting and begging for information, the line was installed but it was the wrong number firstly and then the excuse for the delay was that the exchange box was not accessible!!!. then on Saturday 15 August the service was interrupted without warning, As it happens this was part of the process as the line was being tested! no one told us about this process. we operate a guest house and this has been a terrible inconvenience, which we do not care about and keep on passing the buck. Very inefficient and unprofessional. Now we are being told that we cannot get the original number because we moved to a new area with a different exchange , no one told us that and all our stationary and business cards have the original number. The saddest part is that they truly don't care and there is no one to take responsibility for these issues. what do we do then for service? a new service provider is needed in this country!