So, my question is will the bootcamps consider me eligible for their training program. And do the bootcamps give job assurance to all those who finish their training .
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I cannot speak for all bootcamps, but to answer your question in a word: yes.
I had attended Ironhack's Full Stack development bootcamp in Miami that focused on the MEAN stack, having had even less relevant experience than you (I had only worked a variety of retail and call center jobs, and briefly worked assembling aircraft parts before this), and was hired straight out of the school as a Full Stack .Net Developer. Your previous experience would actually put you at an advantage, if anything.