Data Theft Termination

Hi , I was working with a firm from past 3 years but on 8 of June I planed to leave the organization due to salary issues and then I cane to know I could work with the competitors on my own so I gave my resignation on 10 and the I was serving my notice period and was working for the competitor while I was employed by my company and then on 15 of June my employer came to know that I'm misusing his data for my benefit and then they forced me to work with them but I said no then after that other day I called my boss to ask what to do next do I have to serve any kind of notice or not he said that no need to serve notice period.

After that they didn't gave me any letters regarding to my employment with them and they not even cleared my fnf and after 2 months they are now forcing me to sign some bond and affidavit stating that I don't have any data n all with some third party clause and all .but I am not signing it so they have now send me a legal notice.also when I left the organization they took access of my email and took the payment from other competitor on some random guys name.n now they are saying that go and prove it that company had taken the payment.also they are not clearing my remaining due also they are not giving me any papers or documents regarding my employment with them.

Also they have not issued any acknowledgment letter when I joined nor I have signed any bond with them.

Hi, what you have written here is very disjointed. Trying to make sense of it but somehow unable to do so. First of all it is naive to work for a competitor while you are on your notice period especially from the current employers premises (if that is what you have written and we have understood).
Some questions
Have you agreed that you misused their data?
Did you give it to them in writing?
Given the confusion in your statement we will not be in a position to answer you.

No I have not given anything in writing but they have my chats of skype.
They are trying to get my signature on affidavit which says that I don't have any data and won't be using it in future for my person benefit nor incite any third party to sell the data to any competitor.