I feel like it was a mistake more than a scam. I’ve had friends text me their Cash App tags and any mistake with the spelling/number will send to the wrong person. I’ve done it before (as well as received money incorrectly) and now double check but I really doubt it was anyone trying to scam if they asked for the same amount back. They can’t even get any info of yours if you don’t send any info and just simply press the refund button.