blacklist a sky supplied iphone 14 pro imei

[OliviaD92]

I purchased a sky iphone 14 pro in 2022 but have since moved to another provider for the sim card. I recently sold this handset but it has been lost with EVRI.

They are asking for proof of the IMEI being blocked but I can't contact the current network provider as the handset was only used on the previous sky sim only contract. 

[caesarome]

Have you spoken to Sky about getting it blocked as it isn't clear from your post if you are still paying the phone off via them or not, eitthey way I would call them to see what they say.