Threatening letter to my 80yr old Mum who has dementia because she hasn't paid her £5.86. Account is now locked, so I can't pay it for her. Lost count of how many people I have been passed through to try and resolve it. Promised a return phone call. It never happened. Spent 1 hr 17 minutes on the phone waiting to speak to someone capable of helping. Tried X direct message, followed the instructions on Facebook to direct message. I just want to speak to 1 person who can help Customer service appears to be non existent Despite numerous phone calls and emails, today (a month later) I received 3 bills, 2 from 02 of different amounts £13.37, £17.72 and one from a debt collection agency for £15.24. I waited on hold for 24 mins to 02 and gave up, so paid the debt collection agency in less than a minute The time wasted to pay such a small bill was unbelievable because they obviously do not have enough customer advisors