Express Appliance Repair

I contacted them for dryer repair. they replaced the heating element which is not working and they took it back. after that everyday i am reaching out them for refund, the operator keep on saying Manager is busy and they will call back. More than 15 days i am following up them. no response, worst behavior. they are collecting the money on the name of service, but actually they are trying to take money us with out doing anything.