Metro Hospitals — I am complaining about that the HR department doesn't give me my experience letter

Address:

Preet vihar metro hospital

Sir I am nirmala work as a staff nurse since last 1 year but due to some reason I m not be able to complete my job...means from November I am not feel good that's why I was not sent hospital and then 13 November I am having my Post basic bssc 1st year exam and I was in punjab and then m already informed to my ward incharge and after some time the organisation gave me the email of absconded staff...but I was not be able to came the organisation in 72 hours because m not in Delhi and than my practical was not completed that's why I was in punjab and thani came delhi at 23 December and then I was informed to my incharge for my duty but she was informed me to that she will inform me after ns mam has came and than 2 Jan she was came but I went punjab for some reason and than 6 Jan I was went hospital but they will not allowed me to rejoin because m not want to continue this job with my study...they are not allowed..then I m requesting for my experience letter and then they scold me and Don't give me...
Please sir help Me to getting my experience letter because I need this...for my future life...
Thank you