Notice period on probation

Dear All, I have resigned from the company because they refused to provide my tour claims to me even after informing to them about my covid infection in writing. Due to non confirmation of my services even after 6 months I was on probation and so I clearly stated the management that I am resigning with immediate effect and no notice period is required to be served. Till date never I have been asked about serving notice period by the organization in any email but yesterday I received my F&F letter showing recovery at my end. In the appointment letter I have 30 days notice period even in probation, but as I was covid infected and as management collected all belongings from my home, so I was expecting reimbursement of my dues. Also to be informed that I have warned the management to sell the laptop if I don't get my expenses, which I have returned later against the assurance letter from company for not doing any legal action on the same. Now my Appointment letter has only front page bond paper but the rest is on normal A4 size paper with reference no. Same...so do I have to pay the recovery charges??? Pls suggest