I had a fuel pump replaced on August 4th of last y...

I had a fuel pump replaced on August 4th of last year. On the 6th of this month my Ford Expedition stopped on me. I had it taking to Beach Ford because they replaced the fuel pump back in August. I get a text message this morning stating that there was an internal failure with my Fuel pump and DPFE SENSOR. To replace them and the fuel filter would cost $1824.68. I informed them that the fuel pump was replaced on the 4th of August by them, which cost me $1317.73. Response was okay I see that the fuel pump is covered but to replace the sensor would cost $438.71. I feel that I shouldn't have to pay this because they missed this back in August, I was told that there was no fault in the DPFE at that time. I get another text stating that after a further diagnosis it was discovered that the BCM was shorting out the fuel pump. How was this discovered now but wasn't back in August? I will never take my vehicle to them again. New total is now at $840.15. So they want me to pay a grand total of $2157.88 for a FUEL PUMP, DPFE SENSOR & BCM. Not going to happen.