Xiaomi India — mi4i mobile, damaged by xiaomi india service centre in calicut — mobnet

Address:

673632

My mi4i phone has a slight loose contact in charging port. I contacted the authorised service centre of xiaomi phone in calicut, mobnet mobiles in yamuna arcade, kallai road, calicut 673002 today morning.. They changed the sub port of the phone and informed me that still charging is not possible, the main port has to be replaced.. When i handed over the phone for repair, the charging was possible with a slight twist of the phone, but after repair at the authorised service centre, now the charging port is dead.. I asked the technician to replace my old port.. However it's not getting charged now.. The authorised service centre has made my working phone dead. I want a solution for this.. The service centre has to make my phone chargeable at free of cost...
Kindly do the needful.