ESLB42

Hi. I see several people have had problems being verified for a personal tax account. I have a UK Passport, but don't have a P60 because I wasn't employed at the the end of the tax year. I worked last summer in a pub before going to university. I keep failing verification and when I call the number on the end screen, I am informed that that telephone number can't help me with verification. How do I resolve this please and what telephone number should I call and what options do I need to press? Thanks for your help

Did you find out what number to call or how to resolve this please his as I am having similar problems?