Can't change my offer

[Sylvie]

Hi @Hedieh, it means there are no offers for you at the moment. Please try again from time to time.

[Hedieh]

Hi everyone, My offer is 8.99 per month for 100 giga and the offer in the website is better. also I want more giga per month but changing the offer button in both application and website is locked for me. what should I do?