A bank increases the amount of installments of a loan without notification

Dear Sir/Madam,

Greetings!

I am an ex-pat who took a personal loan from a bank in Abudhabi. I have 13 months of installments left. My bank changed my monthly installment amount last month without any notification. They charged me an additional amount of 1190 per month for the next 13 months.

When I contacted the bank, they said these are your accrued interest amount as I took deferment during Covid period. When I asked them how much the interest would be before taking deferment, they didn’t give me a proper response.

I initiated a query with customer care asking them to provide complete details about my accrued interest. They are ready to discuss only via phone & they can’t send any emails.

Can the bank charge a high-interest amount for deferment?

Kindly advise me on what I can do, please!

Thank you!