Put the SIM in another or borrowed phone just to receive the code.
When you are in to MyO2 add another contact number which is not your handset and then in future you can choose either number for codes.
As to the phone you stated damage, this would not be covered by warranty and you are looking to insurance
If you need to contact O2
Guide: How to find help & contact O2
This is not O2 and we are all customers here similar to yourself and cannot answer account type queries.
