IELTS

Hi,
It totally depends on the universities that you are applying in. Some university require IELTS some don't. It is not necessary, but it is always advisable to take IELTS before you go for an interview in the Embassy. That shows that you are able to understand and speak the language and you would not be having any problems.

Hi,
To study abroad, you must take IELTS is a test for English language proficiency, it is not a course. Either you must take IELTS or TOEFL. Depending on where you want to study you may also have to take SAT for undergraduate programme and GRE for MS. If you want to pursue B.Com abroad you can do that, your class 12th percentage is good. Take the IELTS or TOEFL. You must also decide where to study. Check different colleges, their websites, admission requirements, deadlines, budget etc. And, choose your option. US, UK, Canada, Australia, New Zealand are popular options.

Yes, of course, it is accepted.

No, your marks in any exam cannot cancel your visa.
Hope this helps you.

You can consider following colleges in Canada:
Western Ontario
Humber College
University of Regina
University of Toronto

Yes, you can apply for post graduate Diploma. Thanks.

You can give exam throughout the year. Anytime, the result is declared after 13 days of exam. I think you should prepare for your exam thoroughly. Complete your intake till May-June. You should give exam in January.

https://studyabroad.shiksha.com/canada/mba-colleges-dc
this link contains all the best colleges in Canada, you can search the one in your region too.

Hi, your IELTS scores seem fine. But, they are not the only criteria for admission. See that you have the relevant education background and good grades to apply.

Hello,
With this IELTS scores, you are definitely eligible for the university. But, can you also tell us about your academic scores in Bachelors, as canada is immensely inclined towards the academic scores. You should have the academic scores of above 60 percent.