What should I do about my remorse after eating three dates from a market without paying for them?

It is permissible to taste dates when purchasing with the intention of buying if this is customary. It is not permissible if there is no intention to buy, or if the seller explicitly forbids it. Whoever takes another's property without right must repent and return what they took, or seek the owner's forgiveness. If it is impossible to inform the owner, it is permissible to return the right to them by any means, with a sincere intention of repentance.