Webafrica

I joined Webafrica and made payment on Monday 27th July. They were quick with installing which happened on Wednesday the 29th July. I received a message saying that I was due another payment on 1st August and my internet line was cut. I have been trying to get hold of them telephonic since Thursday 30th July when I received sms regarding making payment again and I cannot get hold of anyone. I have to go through a whatsapp line which is of no help whatsoever. I am dissatisfied with the service that they are rendering and it's only been my 3rd into using their service. If anyone can help give more info so that I can atleast speak to someone so that I can understand this. My neighbor as well as a friend joint their service in this week and both of them are not experiencing the same problem I am having. Please help. Thank you