Should I cancel this job interview? It is stressing me out!?

After waiting to hear back from this job position for 3 months, they finally called me back and the interviewer called me back on his cell phone, instead of a company phone. He called this Friday asked if I was available for an interview "next Tuesday", but he didn't clarify if that means the 23rd or the 29th? He also rudely ended the phone call saying "Perfect. Bye." then hung up on me. I have found some recent reviews that this company is kind of sketchy, and now I am rethinking about whether or not I actually want to work for them. Would sending an e-mail or a phone call be inappropriate?