You have restated the perenial problem. Need jet hours to get the job, can't get Jet hours without the job.
It has always been thus. When times are hard, the airlines use jet hours to weed out the applications. When times are good they will take you if you have one leg and only seen a 737 on the TV.
The good news is that you have Turbo Prop time. Be thankful you are not on some piston thing in darkest Africa. Fun, but difficult to get into the Airlines from there.
I was once in the same hole. I broke out by selling everything I owned, borrowed some 737 manuals, and did my own ground school. Then found the cheapest 737 simulator, and did the conversion course. Followed by a Day/ Night 1179 with Dan Air. (It was along time ago) I had three job offers on the 737 within four weeks. Dan Air, Monarch, and Britannia.
Remember, The only time you lose is when you give up.
L337