I need assistance I tried to get hold of someone to assist me I recently got accepted into a new employment and my previous job is sorting out my finance and paperwork

I need assistance I tried to get hold of someone to assist me I recently got accepted into a new employment and my previous job is sorting out my finance and paperwork. I ask for an extension on my account until the end of January to cover December invoice and January on 30th of January I was told that I called too late . I need assistance urgently as I even tried to borrow money to cover Rain as my finances wasn't paid for December. All I'm asking is to be contacted urgently regards to this issue and my payment date to be moved to the 30th please