Boardworks surf

I purchased an inflatable stand up paddleboard made by this company and this is the second season I’ve used it. I live in the northeast and therefore it only gets seasonal use on calm fresh water, no salt water. It has been used very little and was in excellent condition as I cared for it very well. A few weeks ago it began leaking air in the side seam for no apparent reason. I used the patch kit to seal the leak but was unable to prevent it from leaking air. It is obviously a manufacturing defect and when I wrote to the company via email I never received a reply. Not a good way to do business in my estimation. They could have at least acknowledged my inquiry. This is extremely disappointing. I waited all winter to use my board and now it is summer and the board is useless. Unless I hear some positive response from them I do not recommend anyone purchase their inflatable boards.