Coin gifting

Hi,
I want to buy character but this sentence pops out: You do not have enough non locked coins to purchase this sale, try again in 72 hours.

My friend send me some coins to buy character. Is there some time period when I cannot use this coins to buy character?

Thanks

Yes, it says "try again in 72 hours" for a reason.
Gifted coins are locked for 72 hours from the time they arrive to your account. (3 days)