Vumatel - Can't seem to organise anything! Terrible service

I installed fibre a couple of years ago through Vumatel and I have been largely satisfied; however, my cable was damaged and on Sunday 14 April, I reported it. The damage was caused by one of my dogs, so I am happy to replace it and pay for it. I was informed that they would respond within 72 hours (your reference 78258). Eventually I was called and informed that as soon as I paid, they would re-install. I was informed that I would receive an e-mail with instructions, and as soon as proof of payment was received, they would schedule the installation. Well, I waited for the e-mail, but nothing arrived. I called them and requested an e-mail again, which they assured me had been sent - well it never arrived. The team called me to tell me they could not install without proof of payment - well how could I do this without an invoice and banking details. I am only too happy to pay... This is a business line, so I needed it up and running as soon as possible. They called me this afternoon, but I was in a meeting. I tried to call the number back, but they do not take calls on those lines. Now I find out that I have missed tomorrow's installation slots and have to wait until next week - well, maybe the week after because I STILL HAVE NOT RECEIVED AN E-MAIL WITH PAYMENT INSTRUCTIONS. I do not know how you run your business, but if I ran mine the way you run yours, I would be out of business. I do not know whether you will respond, but this is appalling