You can take them to the Comcast store and return them.
Comcast store
521 N Thompson Ln Murfreesboro
Hi, you can bring to The UPS store #7133 right across from the shopping center where the Xfinity Store and The Chop House are located. The address is 2018 Medical Center Parkway, Suite B Murfreesboro, TN 37129. The UPS Store is locally owned by and the staff is able to give you a receipt for your equipment and you'll be in and out in a few moments with no charge! The UPS Store on Medical Center Parkway is open from 8:00AM - 6:30PM Monday-Friday and 9:00AM-3:00PM on Saturday.
Thanks! Your answer is awaiting moderation.