I have left o2 and am yet still expected to pay?

[rjones101]

So basically, I had to move my number from one network to another to transfer ownership. This was done easily enough from Vodafone to o2 and then back to Vodafone. When I joined o2 it was on a £10 sim only plan for 12 months, this was set up over the phone and I received the sim the next day. I waited 2-3 days maximum for the number to transfer etc and then contacted o2 in order to cancel the contract (within the 14 day Change-your-mind timeframe, I might add) and receive my PAC code in order to move my number back to Vodafone. They assured me over the phone that my o2 PAC code (once activated) will cancel the o2 contract and I'd only pay for the airtime used up to that point (which I have paid). As of right now however o2 has been in contact with me saying that my bill is due and I'll be charged £6 on top of what's owned for missed payments. The fact that I've got to pay this can't be right as I left with days to spare of the 14 days from when I started the contract. If anyone can help in advising me over this issue I would be extremely grateful.

[Bambino · Accepted solution]

@rjones101 This is a customer community. No one here has access to anyone else's account. You need to speak to customer service.
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[MI5]

@rjones101 

You need to contact payment management.
Details here Guide: Coronavirus Community Help and Support 
To pay bills, ask for payment extensions etc, you need to contact the Payment Management Team.
You can reach the Payment Management team on 0800 902 0217.
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https://www.o2.co.uk/help/account-and-billing/payment-support
Best time to call is around 8.00am