Flipkart — Redmi note 12 pro fraud

I am telling this day by day Flipkart is getting worst and worst no customer support on chat a while ago a Flipkart executive gave me explicit words on call today I opened Flipkart for buying redmi note 12 pro i wanted to exchange my phone for it but after a while it suddenly disappeared and they forcing my to use there sell back feature on which they were giving me very less amount according to my phone condition and mi is giving there customer extra 2000 off on exchange which Flipkart is not giving and promoting there own sell back freature when I ask for exchange it says not available in pincodes I tried many pincode it's not available in whole India but sell back is available in whole India mean think exchange is not available in a any city or any state I even tried putting Mumbai pincode and still it shows not available they are just frauding they are no giving discounts which company is providing by themselves