Supersonic, clueless, terrible service, no feedback

Supersonic took over as our ISP from Nepic. They did not adjust any of the pricing to reflect the pricing they offer new and current customers, so firstly, this was a money grab as money for nothing and not very ethical as a company. Secondly, I have cancelled my service with them on 30th April with email confirmation from them Our company is using Mweb as our SP and Partner to access work content. I have since sent over 120 emails, 30 Social Media engagements and several phone calls, where no one had record of my cancellation even though I have provided their confirmation as proof several times and noone has taken the 2 minutes it takes to register the cancellation on the carrier Frogfoot's portal in order for my line to be moved to Mweb. Supersonic does not have a clue what the words admin or customer service means