Delhivery — My consignment is not delivered till now its been 20 days

We have given my 8 boxed of household item which includes tv as well given to one local partner which later handed over to delhivery, after so many calls and follow up they sent me 7 boxed where one box of tv they have mis placed, and asked for receiving, we have given receiving for 7 boxd stated that 1 box is missing they said on they ll deliver next day its been a week we are calling them and they have no idea where my box is; it a delay of now 25 days that they have taken still doesn't deliver all the boxes, and they are showing delivered all boxes ; I have video o[censored]s counting in front of them but that 32 mb how can I send
I need this to resolve ASAP