For any issue with your BHIM UPI transactions via Cointab app, you can contact:
Cointab:
In-app chat or via contact us page
Federal Bank (our partner bank):
https://accountopen.federalbank.co.in/CustomerPortal/index
NPCI:
https://www.npci.org.in/what-we-do/upi/dispute-redressal-mechanism
