I'm hoping you've heard from somebody by now. If you haven't, please send an email to
studentservices@manhattangmat.com and someone will get back to you soon (note: tomorrow is a national holiday in the US, so the office will be closed - but someone will get back to you next week!). If you are not in the US or Canada, and you want to talk (as opposed to email), please include a skype name (or equivalent) rather than a telephone number.
If you are in the US or Canada, you can also call 800.576.GMAT. (Again, the office is closed for the holiday right now - but we'll be open again on Tuesday.)
We have lots and lots of online courses; look here:
http://www.manhattangmat.com/Programs/Complete-CoursePut the name of your city in the box and hit enter. You'll be shown available live online classes as well as in-person classes if you live in a city where we have classes.
We also have a self-study program where you have access to tapes of the classes (so you don't sit in on live classes). This program is better for someone who wants to study alone, or for someone who can't commit to attending a class at the same time every week. As you noted, you can't actually ask questions in this program because you aren't attending the class live.
The classes run for 9 weeks and follow a set syllabus. You mention that you have less than 60 days until your test - you may need to postpone a bit if you want to take a class beforehand. (Alternatively, you could do private tutoring. This is much more expensive, but allows you to work at your own pace.)