I don't have PlayStation plus and deleted my saved data if I subscribe to PS plus will my deleted data be there? I have used all my trials and I DO NOT have PS plus this current moment. So shall I purchase it to get my save data back or am I wasting my money?
Unfortunately, your most recent data is gone.
If you previously used PS+ trial and had auto-upload enabled, it's possible that your saves were uploaded during that trial time. You can check if you have auto-upload enabled in "Settings > System" (see Auto update/download on PS4).
So, in the best case you can restore your old saves if you purchase PS+ now.
See also Data management on PS4.