Moving from Pay As You Go to Pay Monthly - keeping the number

[Voocash]

I recently purchased Pay Monthly option but I would like to keep my old number from Pay As You Go. 
I have received new SIM card with new number but I'm stuck now. I don't know what to do.

I read this topic: https://www.o2.co.uk/help/phones-sims-and-devices/how-to-keep-your-mobile-number

and filled 'Keep your mobile number' form https://www.o2.co.uk/help/phones-sims-and-devices/how-to-keep-your-mobile-number/online-form

but nothing happens so far... no further instructions are given. What should I do ?

[MI5]

@Voocash 

Once O2 have processed your request, you will get a text giving you the date of changeover.

This may take longer than usual due to the current situation but if you don't hear anything back, chase it up with customer services Guide: How to find help & contact O2 

[Voocash]

It has been 48hours and still no response... What to do!?

[MI5]

@Voocash 

Chase them up.

[Voocash]

Yes, easy to say but HOW? Live Chat seems to be disabled now and the only place I can ask for help is this forum. Any ideas?

[MI5]

@Voocash 

Unfortunately, we are not O2 so cannot access your account or make any changes to it, sorry.

[Voocash]

That is alright, can you please tell me how can I chase them out then?

[MI5]

@Voocash 

Early morning around 8.00am is the best time to call.