I talked to this person on Telegram (sent many messages, exchanged pictures), and then called them a few months ago via default Calls Android application.

Contact was deleted (call logs too), and Telegram chat / contact deleted as well.

Is there any way I could retrieve this person's telegram contact, or telephone number?

Telephone company only saves 1 month call logs (Vodafone).

Thanks a lot.

I talked to this person on Telegram (sent many messages, exchanged pictures), and then called them a few months ago via default Calls Android application.

Contact was deleted (call logs too), and Telegram chat / contact deleted as well.

Is there any way I could retrieve this person's telegram contact, or telephone number?

Telephone company only saves 1 month call logs (Vodafone).