Global Auttomotive of Miami defective fuel pump miami, Florida

i purchased a fuel pump on e-bay august 18th. receivedit the following week. after installation it worked for a little over two weeks till sept. 10. i notified them at once. they responded sept 11 and said they would send warranty instructions. after receiving them i filled out instructions and returned part through priority mail. i mailed it sept. 17th. i checked on the 21st and they asked for tracking number. i said no tracking sent number priority mail. three days later, on the 24th they said they were checking for it. on the 25th they sent a e-mail declining my refund. i had not asked for a refund and notified them of that. i then bought another fuel pump and asked for a refund and said i would except a 20% restocking fee. they replied they had sent it to their testing facility and would get back to me. on the 28th they sent me a STRONG message saying refunds are for new items only! on the 25th when i got the decline e-mail i went to PayPal resolutions dept. and filed a claim. on e-bay they advertise a lifetime warranty but then reduce it to 30 days when they send you their warranty papers. i had to pat for the mechanic to install it, then remove it and now ill have to pay to have it installed again. and i had to pay to have my vehicle towed. i have been without my vehicle for almost three weeks and they still have not said there sending the replacement fuel pump even though i have another one coming. i believe their selling practices are deceitful at best and my even be fraudulent! i think this company is a sham! period. i have purchased things off of e-bay for years and never been treated like this. my only mistake was not closely checking their ratings on e-bay which are around 98% satisfaction! many complaints.