Resignation not accepted

Hello.. I am a managemnt traine in a general insurance company. There is 1 year of probation peeiod. I am in my 5th month of service. Due to excess pressure , i putted my resignation on 27th of may(15 days notice period). My notice period is ending on 11th of june. The problem which iam facing that , i given my resignation on mail to my immediate reporting managerand HR, since all work in this conpany happens on mail . They didnt responded on the mails few days, and only disscused with me on phone about my leaving step. on 9th of june my reporting manager told me that i cannot relive you before 4th of july and when I said that my notice period is ending on 11th of june so he say i havent accepted your offer letter yet. In my offer letter , there is no mentioning of acceptance of offer letter. But there are two points which i do not understand. 7.6 Termination of your employment under this paragraph would be without prejudice to: (a) the company's right to claim the actual damages it has suffered through the breach on your part of any of the responsibilities or obligations in this aggrement and (b) any other relief to which the company may be entitled under contract,law or equity. 7.7 The companys decision as to the termination of your services or employment shall be final and legally binding on you . since my notice period is ending on sunday so iam going to monday and willing to submit all the assets of the compnay. But what should i do because my manager is not willing to reliving me after my notice period. I cannot stay in this company, even for a single day. Can they hold my reliving letter, and can they take any legal actions on me? And how should i subit all my assets of company?