My usa visa had been rejected twice and my ielts score is 6 with no band less than 6 and my aim to study masters What should I do and apply to the alternative country?

You definitely don’t want to lose out on your chances of getting your visa again and so you need to make sure you have everything in place. I suggest you directly get in touch with Study Abroad Experts here. They have been guiding students for visas for a long time now and so I believe they will be able to help you with all the information that you need and also assist you in the complete process. 

Hope this helps!