Issue of Debit note without issue of Original Invoice/ bill of supply is not valid [Sec 31 to34 GST]

I think as per section 31 to 34 of GST Act,2017 issue of Invoice/bill is mandatory and it becomes a precondition to issue original voucher before issue of  debit note . How to meet the situation lawfully?

I purchased LG Refrigerator from a local dealer which turned defective & necessitated replacement.

I got replacement from LG instead of local dealer.

Now local dealer or LG are not issuing invoice/bill.

LG have issued debit note to me without my name & address as customer without issuing original invoice/bill of supply.

I also paid difference between old (depreciated value) & new model. LG don't give me receipt voucher or money receipt.