Vox!!!! Fix my connection and sort yourselves out! Poor service

I've honestly had it!! 3 days and I have no connection. I work from home and I'm using my money to call, my money to buy data and there's a debit order that went through for March (No discount), yet I have had 3 days of no connection. Prior to that, my speed dropped from 20 download to 7. What the hell is going on!!! I've been told technicians are working on it, for how long!!? There's a debit order coming up now on the 1st of April, again I'm going to pay the full amount while I don't get the full benefits of what I paid for! I asked to be put through so that I can cancel and of course, the call cut. I need this issue resolved immediately or I will have to honestly reverse my debit order. This is not what I paid for. I have already paid a quarter of my next debit order over the last week because of this.