Two months to schedule a fibre installation

Dealing with MWEB has been a frustrating experience. I have now been waiting two months for MWEB to schedule a fibre installation. I have called their call centre over 20 times - each time I have been told that the issue will be resolved within 72 hours. I have requested call backs - which were not returned. There is no possibility of speaking to a manager as the call centre can not transfer you to a manager, they don't have direct lines, and you can't access them by email - essentially, managers are unreachable. There is no indication that my issue will ever be resolved. MWEB are either unable to resolve a simple issue or not interested.