2nd Phone faulty

I purchased a Karbonn phone from neotel about 1 month ago. I had to take it back the next day to exchange it as the phone was faulty. The gave me another karbonn phone. Today the phone is showing me that it has a sim access error. Since yesterday i cant phone out or receive calls on this number without a struggle. <br> I phoned the branch explaining to them what happened and now i have to take time away from the office to stand in the store for another hour like last time for another problem phone. <br> <br> I am using this number for business purposes. How on earth is my clients going to contact me and also who is going to compensate me for the business i am loosing?<br> <br> I really think i made the wrong choice to go with neotel. I am very disgusted with the way the gentlemen on the phone remarks when i complained about the handset being faulty again.