Urgent Help for Michelle's Family Relocation

Hi. My name is Michelle. Me and my 2 adult kids on the spectrum had plans to move back to St Cloud Florida from Melbourne Fl at the end of this month (May). We applied and were approved for an apartment. Sadly this apartment complex has turned out to be greedy and are telling us that they cannot hold the unit past the 23rd even though we paid a 350 dollar holding fee. So as of right now we need to come up with $ 294 in pro rated rent and $422 which I am short on the balance of the security deposit. Any help would be truly appreciated. This has been stressful on our family since I have already given notice where we live at the moment and I have already transferred my job to St Cloud. All fund will be used towards moving in and expenses. God Bless.