Can anybody tell me why I cannot receive refund?

I filed my tax on 3/30/19 but haven't received any refund yet. Usually I get within a week every year after Accepted.  I called IRS today and he said "I should contact Turbo Tax. Maybe that's because you filed Turbo tax free edition."  After that, I found the account number and routing number of the account to receive my refund on my tax file was somebody else's account info.. I have no idea whose account info this is and how to get my refund now...I really appreciate somebody can help me.