Lg Microwave handed in for repairs

I bought a Lg Microwave from this store on the 4th of October 2014, it worked well untill July 2015. It stopped working and I took it in to the branch and was told that they will sent it in for repairs. I handed it in on the 6th of July 2015 and called the person working with repairs and complaints, Johny, numerous times to see when I will get it back. Everytime I called he had a different story, the last time I called was on Monday the 20th, He said he would call me back the same afternoon, it is the 24th and I still have not heard anything from him.. I would like to know what the problem is< can they repair it or are they going to replace the microwave, seeing that it has a 2 year guarantee. I would like to have feedback as soon as possible