Not getting whts app verification code since 10 days

: I am trying to login with Samsung Galaxy Flip Z  since last 10 days but not receiving verification code or call option

I tried all troubleshooting methods, changing sim card slot, waiting for some hours but no response is receiving regarding my problem.

whenever i am mailing support always getting auto reply format that you should have active sim and all but I was using whts app on same handset same mobile operator and now it is being headache,

Please its my humble request that whatever issue is with my number please solve and give me appropriate solution.