My carrier signed my name while I was at work and now my package is missing I need someone to contact me ASAP someone is going to jail

My package that required my signature is missing with false information. It states delivered Oct. 1 with no answer. I was home. I went to the USPS website to scan the pink receipt for them to redeliver following day with instructions to knock on my door. Again, no delivery. However, the status changed to delivered at front desk with a signature at 4:09 Sat. October 2nd. I was home, there’s no excuse. Secondly the office is closed by 1pm on Saturdays. Thirdly, I never signed anything and since the office is closed, neither did anyone there which they are not approved to sign. So the mail carrier must have signed the form, stole my very expensive and valuable package that is irreplaceable and entered false information on the status of my parcel. Reading other comments on here, this has been an issue with your local branch and by the response, I can only assume nothing is being done to protect us from being robbed by your employees. Stealing packages is a serious crime and jail time

Don't know what to tell you. Call a supervisor.