MWEB - Poor customer service

We have a 100mb fibre line at our office, and have been struggling with slow speed and poor signal at our office for months. We have called MWEB numerous times to resolve this and find out how to fix it. They refuse to send out a technician. Everytime I call they divert me back to admin or paperwork and delay resolving the issue. I called again this morning and spoke to Shaun, he tried to be very helpful, he said that the problem has been escalated and a ticket lodged with Octotel last week, but still no solution. If our fibre line has not been fixed and a solution given to us within 24hours, I will have a block put on the debit and cancel our service to opt with another supplier. We cannot run our business with this line in its current state. Can a manager or supervisor please contact me urgently to resolve this.