One GST party exceeded 5 crores in the year 2019-2020 but now its T/O is 5 lakhs so can it go out from E-invoice?

Dear Respected and Loving Experts,

My vendor has issued some wrong invoices to us which we have informed them that we are not accepting the said invoices, we have not booked nor taken any ITC on those invoices, this is for FY 2022-23 , now the vendor is saying as per GST Rules we can not simply ignore the invoices and should have issued debit note against the same. Is it true? But we did never accepted the invoices in the first place so there is not question of issuing a debit note if my understanding is correct. They had issued us some 1.5 CR of wrong invoices instead of some 10L of monthly invoices, we never accounted 1.5 CR of invoices. So we never booked nor issued a DN. Is there any law / notification etc ? Since they did not issue the CN they lost the ITC and now they are blaming us that we should have issued a DN which makes no sense to me. Even if we issue a DN, we will not upload anywhere to enable them to claim the ITC. We do only issue sales invoices to customers for the services we offer to them to them against which they get the ITC.

Let us know your views on the same.

Thanks and have a nice time ahead :-)

Sir,
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Question:
Gst officer visit in business principal place sale turnover decrease reason asked provision in gst act.

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Dear sir,

We have to give Debit note to RCM supplier, so i have few question.

Shall we have to Charge GST to that supplier ?
If we have to not charge GST then we have to reduce the Rcm liablility ?
How to shown the transaction ?

Please guide !

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