If you have still been unable to get through on the phones or Live Chat on the Web site then you can send texts to this number 07533 051809 with details of the issue. Might take a while for a response but might be quicker than the other options.
But you need a customer services representative as they have billing access permissions to make amendments to customer accounts, but they don't operate on this forum.
Please hit the Kudos thumb to say thanks and mark answer as Helpful if the reply has helped at all
Here to help! I'm a technician helping out whilst working from home. Find out more