STAC number

[petrupoiana]

Hi. I was given a STAC number from my old provider (Three mobile) . They said I have to use it with another provider (I am with O2 now) in order to be cancelled. Can I do this online, or it is better to go into a O2 shop, and ask them to help? 

[MI5 · Accepted solution]

@petrupoiana 

You'll need to call customer service.
Numbers here Guide: Coronavirus Community Help and Support 
When it comes to the reason you are calling stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say "Upgrade", "Lost/Stolen" or "Fraud" if you have to, to get put through to someone.
8.00am is the best time to call if you can.

[petrupoiana]

Thank you  MI5, very kind of you!

I was in town centre Sunday, at the O2 shop. I ask one of the assistants about my problem; the answer was: they can't do anything because it is too late: I supposed to give them this STAC number in the same day when I signed the contract with O2.  They advised me to phone Three mobile (the old provider) and ask them to cancel the contract without STAC number......

[MI5]

@petrupoiana 

That would work also for you.