UPS transferred my package to local post office a week ago and still have not received package

Question

I ordered a pair of headphones online and got the email saying it was shipped on April 20. I live in Buffalo and the package was shipped from Syracuse. I tracked the package on UPS and it said it transferred the package to the local post office in Buffalo on April 21.
When I checked the USPS website, it just says been 7 days and I still have not received it. 
I need help in finding out where my package is. I'm wondering if it got lost in the post office since it's a pretty small package.  
Should I contact Best Buy to replace my order and mail me another one? The address I'm living in is temporary and I will be moving from that address in two weeks so I'm worried about how long it will take. (I cannot have it mailed to the store to pick it up because I do not own a car and the local Best Buy store is too far for me) 
Order Number: {removed per forum guidelines}
USPS Tracking Number: {removed per forum guidelines}
This is what it says on the UPS website 
04/21/2015
11:48 A.M.
Package transferred to post office
Buffalo, NY, United States
04/21/2015
7:11 A.M.
Destination Scan
04/21/2015
4:16 A.M.
Arrival Scan
East Syracuse, NY, United States
04/20/2015
11:44 P.M.
Departure Scan
04/20/2015
7:49 P.M.
Origin Scan
United States
04/20/2015
4:25 P.M.
Order Processed: Ready for UPS
Tracking info from USPS 
April 21, 2015
Pre-Shipment Info Sent to USPS
The U.S. Postal Service was electronically notified by the shipper on April 21, 2015 to expect your package for mailing. This does not indicate receipt by the USPS or the actual mailing date. Delivery status information will be provided if/when available.

Answer 1

Hello dsh,
One of the least enjoyable things about shopping online is when a shipment enters delivery limbo. I've had it happen too and it can be quite aggravating. I regret that your order seems to have gone missing and the inconvenience to you I know that entails.
Using the information you provided when you signed up for Best Buy Unboxed, I was able to review your account details. I note that you called us yesterday and that the agent with whom you spoke was able to arrange a reshipment for you.
If you have questions or concerns, please let me know. I'm grateful that you took the time to write to us!
Sincerely,
John|Social Media Specialist | Best Buy® Corporate
 Private Message