keep paying the rent or lose your deposit
Depends on your situation:
In the UK there are several options available to you.
But its a case of searching around, some even ask their banks for a temp overdraft.
If you are working - save it and borrow it.
If you are unemployed there are DOZENS of charities such as shelter who offer deposit schemes.
It's for a private rented property
A deposit for what exactly?
uk
What's your question about it? Add details if you have to