IndiaMart — deduction of monthly charges even after i have notified that i want to stop using the service 5 days before month end.

To,
Whomsoever it may concern

At the beginning of the month of july i called indiamart helpline to talk about that i am not happy with the service and wish to stop using it. One of their executives told me to call on 26 july and inform me that i wish to close it, and in return they will give me one additional month free of cost.

I called on 26 july at the executives number which he shared with me but was unreachable, i called 5-6 times but everytime it was unreachable. Then at 6 pm i called at the indiamart helpline number which i got from the app and informed that i wish to close the service. The person told me that i will get a call within 24 hrs. Which i didn't.

I again called the next day and was told the same reason. But i assumed that my request is processed and i am not getting a call cause it is weekend. On 29 july i again called the helpline number stating that i havent received any calls yet. I was again told the same thing.
After some time i got an email from the executive whom i was talking to that he tried calling me but was unreachable.
I tried calling him buy he was unreachable again so i sent a mail to his account regarding my issue.

Till the evening of 31 july i did not received a single call from them even when i have called and filed the complaint many times. Twice on 30 july as well.

On the evening of 31 i get a call from the executive i have been talking to stating that my service cannot be stopped cause i did not inform on time and as a result the amount was deducted already. I was surprised to hear so cause as per his instructions i have already filed for account closing on 26 july. He told me that i called after 6pm which is their office closing time and they go home before 6 so he did not received the request.
After talking to him i decided to file a complaint against the person on indiamart itself.
Within 2 mins i got a call from the executive's manager stating that she'll look into it and will get back to me asap.

Around 6.30 pm i got a call from the executive again stating that if you had a problem you should have told me directly, there was no point complaining, and he started arguing. We both agreed that there was no point arguing now and lets wait what the manager decides.

Next day i got a call from the manger stating that my services will be closed and shortly but for final feedback i need to consume a buylead, and she will notify me with all the details the next day.

Next day i got a call stating they can't return the amount cause they have filed the gst on 30 july already and thus cant refund my amount.

First of all why did they file for gst on 30 july if i have filed a complaint for closing on 26 july. Secondly there was no calls or mail from them regarding my issue up until 31 july evening. If i have filed a complaint on 26 and sat sun is holiday than i should have received the call on 29 itself.
Why did they wait for the amount to be cleared and then wait to notify me.

I feel i am duped and i need my full amount to be refunded.