Poor signal and poor customer service

Very poor signal, even worse since the beam migration. No longer have a call centre number to phone, no longer have a customer care e-mail address to write to, only facility is whatsapp and the response time is very slow. I have been receiving multiple complaints from my boss about the poor signal and cannot provide any feedback as to whether it will be resolved. He has asked for a contact name and number of a person in charge to speak to, no response as of yet.