Disabled road tax

Does anyone know the telephone number to request a new road tax exemption certificate.
My PIP was due to end next April, but I got a letter saying, because of the corona virus I had been given an extension til 2023, but there was no exemption certificate, my old one says it ends in April 2022 and so I cant get the tax out on the car. I have been looking online for the contact number for the DWP but can’t find the number to contact for the requesting of a new exemption certificate anywhere

You might need the DVLA rather than the DWP, I’m not sure, it’s just a thought.