Mobile provider complaint handling failure (escalation)

Typical aim: Formal complaint escalation; resolution; goodwill/compensation
Be specific: dates, times, order numbers, names, promises made, and the resolution you want.
We’ll reference:
Acts & laws: Ofcom General Conditions (complaints handling)
Ombudsman/Regulator: Ombudsman Services: Communications; Ofcom
Guidance: https://www.ofcom.org.uk/complaints