Contractor unable to assist

I am writing to escalate claim number ***, which remains unresolved.

On 28 May, your appointed contractor, Dave Miller Plumbers, returned to my residence to replace the tempering valves in an attempt to fix the issue where only one person can bathe before the hot water runs out and needs reheating. Unfortunately, this intervention did not resolve the problem.

I contacted ABSA the following day to report that the issue persisted. The consultant I spoke with assured me that the contractor would follow up. However, to date, I have not received any further communication or assistance.

I kindly request urgent attention to this matter and a clear resolution plan. Please advise on the next steps.