How to verify account if I don't have access to my old phone number?

Hi!

I’ve used a temporary number (which already expired) to register account. Before, Instagram always allowed to enter new phone number upon verification, but now there is no such option.

I do have access to the email address of this account. Are there any options to contact Instagram? Seems like they removed possibility to contact them from their help section. Do you know other options regain access?

Account was in photography niche, 80k followers. More than 4 years of hard work and dedication.

Thank you!

Can not log in?
If so, change the phone number.
If you have access to an e-mail, please do not forget your password and let them send you a link to log in to the e-mail.

that aint no working, it sends to the phone number
Had this issue as well - still not solved