Fraud done by aditya birla home finance

I took the loan from aditya birla of 20 lakh for flat in 2018 and they told me it was mandatory to take 70k insurance policy but now I am transferring my account to other bank then they told me to clear my insurance premium. I already paid 55k interest and 4k as a principal in 8 years now I paid remaining 66k for final settlement for clearance out of 70k. Even my loan was on floating rate but they charged foreclosure for both loan and insurance. Even I asked them about my insurance coverage against property copy they told me it was already got expired in 2023 but they converted my Emi for 35 years as per loan when I complained about why thy converted emi which already expired and have no reminder. they told me this is my mistake and I asked them to show my insurance premium copy then thy told me it was 8 years old and thy didn't find insurance documents then thy told me to send an email to Liberty mutual insurance for copy after sending 2-3 times email now after clearance thy share copy but in that insurance no signature or any proof they just mentioned my name and details. why they took 1 month time to respond definitely it's fishy they make new policy. Lastly I gave final settlement cheque for pending principal amount they charged 7 days advance payment for cheque they told me once it cleared they will give remaining amount in 15 days. I asked when I already cleared and gave final cheque then why they are charging for per day charges for cheques. Please suggest me what to do they done mentally harassment to me