Disappointing and pathetic service not yet resolved over a week later

Been over a week since I lodged this complaint and issue still not resolved. A simple upgrade and price match not yet honoured despite being promised that it will be done. Pathetic service. Raised the same issue with over 6 people and nobody comes back. Even stated the times of the calls and each consultant says they will Listen to nice logs to confirm the call but never ever reply. Poor systems , poor service delivery and shockingly disappointing. The team leaders and managers also failed to resolve the issue despite me asking to speak to them. What a waste of previous time….