Criminal complaint u/s 420

A gave written complaint, notarised loan agreement, bank documents as loan was via NEFT on 02.11.2019 at nearest police station against B. (Amount involved is Rs. 4 lakhs). A was given a petition copy dated 02.11.2019 from police station. On that day itself i.e.02.11.2019, the Sub Inspector called accused to come to police station as matter was serious, (Section 420 case), on next day itself otherwise he would be forced to send notice but they didn't cooperate citing absurd reasons and till today didn't again pick calls from police. A's lawyer said she would be in advantageous position if she got FIR against B. Now A is a bit anxious. Should A be in constant contact with police regarding this matter? Should A be patient and wait? What happens next? One more important thing, the accused said in call from Sub-Inspector that she will bring bills (cash bills) that she incurred on behalf of A as a defence for Rs.4 lakhs given. Can't A just admit that and give an explanation that she gave cash to B to incur expense on her behalf, as A has sufficient money and is a tax paying person (she has filed income tax return every year and has Rs 5 lakh income every year)?