Unable to apply O2 open dicount - 'Oops, we’re having trouble getting your details.'

[iPhoneuser]

I was told when ordering my new phone, I was eligible for an airtime discount with O2 open. This was a big factor in purchasing my new phone and contract and I was told I simply needed to contact O2 once I received my new handset to apply the discount. For the past two days now, whenever I log in to apply the discount, I get the following error: 

'Oops, we’re having trouble getting your details. This should be temporary, so please try again in 30 minutes'

Support have told me I have to add the promotion code and they can't do it for me. Is anyone else having this issue?

[MI5]

@iPhoneuser 

It usually takes a few days for the systems to update.

This is a customer to customer community, not O2, so we cannot access your account, sorry.
You need to contact O2.
Message them on Social Media. Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) or give them a call on 202 or 0344 809 0202

Guide: O2 Open & Friends and Family discounts - How to sign up