look IELTS bands despite being important, are only a part of the picture!
visa ultimately depends upon your documentation
-do you have appropriate funds!
-can you prove the VO that you will come back after studies!
-does your offer letter of study match your previous qualification!?
-are your academics good or poor?
-the institute, which provided you the offer letter a reputed public/government institute!?
and many more
thus keeping these technicalities in mind, the judgment of the visa officer is delivered with yes or no!
and i told you in my prior answer that with your current profile you do not meet the criteria of SDS
advantages of applying under SDS are
The streamlined visa process for all SDS eligible institutions.
Less financial and other documentation
Faster visa processing time.
thus, either improve your IELTS ASAP or file you case in general category! (which will be slightly risky,needs much more documentation and processing times are also very unpredictable!)
if my answer is still not satisfactory, I hope seniors will help you better

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