Company not providing my F&F, Experience & Reliving Letter

Hi Kaanon Team, I discussed with my Manager that I'm resigning from my post as I'm not able to deal with toxic environment and in return he treated me very bad because of which I decided to leave company without notice period but was agreed to give remote handover to person joining in my place. I send a resignation letter (20th Feb 2022) and even continued to work for them remotely for a week till my access to system was removed. Then I received a mail (3th March) from HR that I need to provide handover so that they can provide my F&F, experience letter & reliving letter. Even on whatsapp my Manager asked me to provide remote handover and was chatting with me for work related queries from 4th March to 20th March. But no one connected with me for formal handover process even I was sending them continuous mails for update till May End. In June 1st week I got a mail from my Manager that they cannot provide me my letters & F&F as I was absconding and HR & Manager didn't knew of my whereabouts and as company policy remote handover is not allowed. But in actual no one even asked me via call, sms, or email that where are you, why you are not coming to office, or about my reason to leave organization then how they can state me as absconding. Note: As per my offer letter I can serve notice period or compensate with 1 month salary (which already they have not paid to me) and there is no where written that I have to give handover or in person handover.