Worst customer service provider

I took out an internet subscription with Flycool, everything was going well until I requested a link to update my card details as I had been paying with card only to find that the link sent to me paid for someone else's internet at Vuma Flycool. When I contacted them they sent me from pillar to post but what's painful is that they requested for my bank statements and all yet still denied it. I wanted to let it go until I went to Boxer to pay in cash where I was asked to provide them with a reference number that which too I requested from Flycool before going to Boxer store. I have since sent an email and used their WhatsApp support number two of which are yet to be responded to. I'm gatvol because there's so much these company are doing wrong. Once I got an email which actually said I must cancel the subscription if I don't want it anymore whereas all I wanted was an explanation and refund of funds that were incorrectly debited.