First point of contact would be o2 customer service
Either on the phone (landline as you have no mobile signal) or via the email contact us section on the o2 home page.
O2 do not post here it is just customer to customer with a few staff posting as customers.
iPhone 11 Pro 256gb on unlimited data
iPad Pro 12.9” 2020 256gb refresh o2 family discount
Apple Watch series 4
My first mobile was in 1995 a CM-R111 from sony on Cellnet.
Wincanton South Somerset (Full 4g 3G 2g indoor coverage) Remember we are all customers here not customer services