You can request a refund if the recipient's behavior (grossly) violates good morals. I believe that such SMS (as you describe) fulfill the above. ;-) But - keep the SMS, ask for the return of the gift in writing (and keep a copy again) - ideally in front of witnesses, because in court (if the recipient does not return the gift voluntarily) you have to prove even the gross violation ..., even that that you demonstrably asked her to return the gift.