Returns during lockdown period

[Biddy]

I received new a device yesterday.  I want to return it and cancel the contract that I signed up to online.  All the online advice says I need to speak to an advisor but when I call 202 and say I want to do a return, the message is that they are only dealing with priority calls and returns isn't a priority.  I can't find a link on 'My O2' where I can inform them of my intention to end the contract .  Also I don't know where to return the device to as there was no returns label in the package.  I want to make sure this is done within the 14 day cooling-off period.  Any ideas?

[MI5]

@Biddy 

Register your intent with complaints so there is a written record for later when things ca;m down.

Returning now probably isn't possible https://www.o2.co.uk/how-to-complain

[Biddy]

Thank-you - I'll do that