No internet connection due to unreasonable disconnection

I have been with Supersonic Fiber provider for a few years and never had any problems. 3 days ago my wifi was disconnected for no reason, I struggled to get hold of Supersonic on there phone lines and whatsapp. I eventually received communication from a lady on Facebook. I was informed that I did not pay for a whole year, I then provided all the proof of payments and they requested a activation, but still to date my connection was not re-activated and I am on day 3 of not being able to run my business from home and spending money on mobile data to connect all my devices.