Lap Band Replacement

I was told my LAP-BAND® system has a leak. I already had the port replaced in May 2009 but that did not work. Now they want to replace the entire system. Thay paid for the port replacemeent and now they are acting like I may have to pay my part for the band again. My doctor told me this was in no way my fault . My original surgery was done in May 2008 and the adjustments were never completely done before I started having problems. They are offering other types of weight loss surgery which I opted against the first time and still feel very uncomfortable having. Does anyone else have any experience like this or any suggestions for me. Any advice is much appreciated. Thank You