Gst r 1 return issue

I purchase goods from a party that time I provide a GST no. which  I receive from GST.

But the login id password they provide are not working so i raise a request to gst helpline then they change the gst no.

In meanwhile, i purchase goods from another party on the first gst no. they file the GST R 1 and mention the same GST no.

Please know me what are the viable option for me to take credit on new gst no.

Please provide your no.s so that i can call u.