In the general case, If the payment is successful the course gets assigned at the same time.


Sometimes, because of the technical issues at the bank's end, or due to intermittent internet speed, the payment can be unsuccessful. 


That is the reason you are not able to view the course.


Kindly check once if the amount is debited from your account. 
If yes, please wait as in some cases it can take 2-3 days to reflect in our account. Or else it would be credited back to your account.