Offers are managed by ironSource and not by Critical Force.
It can take up to 48 hours to receive the reward.
If you have completed an offer and you're still not paid the reward, then report to ironSource.
Go to offer wall → Reward status → tap on offer → check estimate wait time.
Wait until it's over, then there will be contact support button.
Alternatively you can email ironSource at: mobile-customersupport@ironsrc.com
Please review the FAQ article about this as well: I did not get my credits for completing an offer.