Should I go ahead with presenting incomplete results and partially unverified conclusions in conference?
You should not present results that you know are false:

It could lead to others wasting lots of time and money trying to replicate or build on your results. This makes it unethical to knowingly present results with errors (without disclosing the errors).
You could make a fool of yourself (and your co-workers): there is a good chance that someone will notice, or ask a question that you cannot answer because you presented erroneous results.
Lying is (almost) never a good idea.

There are three things you can do:

Present only the first part of the results, and explain what you are still planning to validate the results. This is probably the best option, especially because you stated in the comments that the first part by itself is interesting and new. Work does not have to be finished or perfect to be interesting.

Present the results with the error, but clearly explain where the error is and why the mistake was made: others may learn from this, and the talk could be very interesting if this is done well and if the error itself is interesting enough. Whether this works depends a lot on your specific case and your presentation skills.

Withdraw your talk. This is the best option if there is reason to believe that others may replicate or complete your work before you can do so yourself. While unlikely, it has happened before, and is worth considering when presenting unfinished work.


Finally: The best advice can be given by your advisor, who is (or can be made) aware of the details of your work, type of conference, etc. You contacted the them by email but they have not responded. Maybe try a phonecall?