Whaaky.com — Supply of Wrong Material against Order

I had given the order for Battery bank of Sony make to Whaaky.com Online shoping with order no S80896350 they had shown wme Sony Brand 20000 MAH I had placed the order to them but they had suppled me MI make then I visited to their office at Hyderabad they Is t told me that they will replace with 10000 MAH 3 Nos of battery bank of sony make I agreed for that but they had given me the 2nd hand 10000 MAH and 20000 MAH of Sony make only but it not atatall working when ever I make the call they are not lifting the phone and on mails they are not atall responding it