Wonder if the job was not done right or original was not evaluated well to have resulted in the caliper to burn up after job was completed.
The primary failure point for calipers is between the piston and the o-ring which requires disassembly of the caliper to even check. Preliminary observation of the caliper did not indicate any issue with the dust boot and some rust on the piston which is par for the course up here. Test drive after new pads & rotors were installed did not indicate any overheating, pulling or any other signs of a caliper locked on.
Caliper life is influenced by a variety of different conditions that cant always be accounted for such as the effect of the varied road surfaces acting on that specific corner of the vehicle, frequency of preventative maintenance such as slide service, suspension setup & corner weight on that specific vehicle wheel during the vehicles operation, etc. Some vehicles never need calipers, others only need one front one or others, like your rear brakes), have both the calipers locked on. Id much rather your caliper issue have been one of the new rear calipers because then I couldve resolved the issue without any cost whatsoever due to the parts & labor warranty offered by my supplier.
I hope this helps you understand the issue with the caliper that we had on your last service. I hope my discounts & offering the caliper replacement at the cost of just the part has made it easier to deal with the unexpected circumstance we found ourself in. Please let me know if you have any additional issues or questions.