URGENT ASSISTANCE in NOC error

HIGUYS I applied for immigration under skilled worker category and I did mistake and need your assistance in it :

I made mistake in the application regarding my jobs history and its NOC required .The sequence of the errors were as follow:-

1.   My actual work experiences were divided to two sections ( first section is in the job description field with 5 years , and the other one is in the market research field with four years.

2.   When I filled in the application, I ticked that i have experience more than years as I thought that they want to know that total number of years of experience .

3.   In the job titles and NOC blank of application, in the same application, I forgot to mentioned the two jobs and i mentioned only the last job.

4.   Besides , when i mentioned the second job which should be Market research specialist , I wrote the real job responsibilities that i as affecting at the same time , but i found that the job responsibilities i mentioned
completely differ from the formal ones that I will be allowed to get by my HR department in the company

really i need your experienced advise for this problem