Bad customer service and making money out of covid situation

I got Covid19 relief which I later canceled after two months funding. When they canceled they reversed 3 months payment which inflated my account with 1month installment. I have called loan department and covid but all I get is sms saying they have been trying to get hold of me. It's been a month now the account hasn't been corrected which means I will get charged more interest on amount I don't know about. I got mail last week requesting for correction but to this day nothing. I really feel bad for those customers who are not paying attention to their loan statements or don't have access to online banking. If it took them 3 days to create a mess and they take more than month to correct their entries what are the chances that all customers who have app**** have correct entries. I feel the bank realized interest on covid funding is little as compared to normal loan en that's why they are messing accounts up just to profit out of this unfortunate situation