Send one written demand listing the promised deliverables, payments, missing evidence and a deadline for response. Ask for either the exact MCA filing evidence or a refund/settlement explanation. Preserve invoices, bank/UPI receipts, emails and messages.
If there is actual suspected impersonation, forged documents or unauthorised use of credentials, treat that differently from poor service and consider appropriate cybercrime/police/professional channels. Do not label an ordinary delay as cybercrime without evidence.