Ali Express — requesting the refund amount

Dear madam/sir,
I suresh mattaparthi has purchased two power supply boards on your site[protected] and ii received them on in time. Among both products one is working fine and the other is not working, regarding this i contacted the custamer support many times and as well as the seller too, as per the seller requirements i have sent them the images and video of the product which is not working, i have showed them the proof but later there is reply from the seller, regarding this i contacted the custamor support many times to help regarding my concern but they were saying we will look into this and we will help you but no use at all till now. I have contacted many persons like sabrin, valentina, lucy, savaigne, angeline, noerenne etc. All are telling same words like we have mailed them please wait for a week we will surely solve the particular concern but no use still now i have waited nearly a month. Even now they used to that please wait for 5 more days so that we will surely help you regarding this by taking my superiors help we will surely take an action on the seller for not to responding and for crossing ali express terms. I waited and waited for many days but no use finally i came to know that the ali express and the seller are combinely cheating customers and blaming them by telling lies. Finally i request you people to solve this problem asap.