The credit card company claims for a big amount while the real one is much less

Dear sir/madam,

I was misled by information from the credit card company, due to which they overcharged me and was unlawfully demanding the amount to be cleared even though the mistake was from their side.

They just deleted the email from their side when I highlighted they made a mistake in their communication and it wasn't my mistake.

After this, they kept on harassing me and then I stopped paying my loan and credit card asking them to clear the issue. But instead, they bounced the cheque for 65k even though my card pending was 6k and the loan amount was for 29k AED.

I now have a police case. What am I best supposed to do in this case?