As per my understanding of what you have written - Bhardwaj Clinic and Bardwaj clinic are two different legal entities with two different GST numbers
The accused was asked by Bardwaj clinic to pay XXX amount in 15 days failing which he will be charged with section 138 NI Act
He called Bardwaj clinic which denied any cheque bouncing and notice.
Since the accused was not able to confirm any notice by Bardwaj clinic I think typographical error will be very costly for you .
The notice can also be termed as vague, ambigues and Omnibus because it does not clearly indicate to whom the payment needs to be made .
Same is the case when amount which is
due is not clearly mentioned in the notice than the notice is termed as omnibus notice .