VAT re-registration on Government Gateway

Hi, Limited co was VAT reg for a few years, de-registered as stopped trading activity. Filed dormant accounts for a few years. Limited Company then started trading, met threshold for VAT registration. Re-registered and had the letter saying effective 1st March 2024, however the VAT on the GG account is the prior de-registered VAT account. There does not appear to be an option to add another VAT scheme when you select "Add a tax to your account to get online access to a tax, duty or scheme" as it is already there. We managed to remove the VAT service. Then when we try to re-add the service it tried to re-add the old de-registered VAT scheme with the old VAT number. We are going around in circles. I will ring and ask for advice but felt someone else may have come across this and be able to assist. Thanks,

Hi Rebbecca Symons,
Please call our Helpline so that we can have a look at the account for you.
Please see below:
VAT: general enquiries
Thank you.