The reason for insist persisting

I become a foreign sales rep as I had finished my studying. The company I work for is small and the accommodation is very bad. A There is a road is just behind the accommodation that it's extremely nosy at night. At my When I first arrived here,I can't couldn't even fall to asleep. Besides,On top of that, the food offered by the company is too peppery to eat. As the result,I can feel full up very every day making leaving me no power too tired to work intently properly.
That confused me for about a week. It was a hard time for me and made me to think to about giveing up.
At that time,I suddenly remembered what my mum said to me.------, "Once you start your working career,you must insist keep going no matter how difficult it is. If you are tired,go home, have a rest, we will all support you forever."
Return parents is the power I do my work. (Sorry I do not understand this line).
Quickly,my negative emotions were gone. After that I adjusted to the conditions and pay more energetic to my job went about my job more energetically. I will go on,and hope very everyone finds their reason for insistto persist at what they do!

The yellow shows were you should use a space. You must leave a space after commas and full stops in English, or it makes your work very difficult to read and understand. Also, please pay attention to tense and keeping your tenses in line throughout your writing.