I had a kitchen fitted bu my builder in september. I noticed a few days ago that it has blown slightly where the join is in the laminate surface. I have no idea how or if he sealed it and if I ask he is bound to say that he did everything to regulations! What should he have sealed it with? ( it doesn't have a joint strip on )
I do think that you should go back to the person who fitted the kitchen.
It maybe that there is a fault in the worktop
or
it may have been badly installed either way get his view, he must offer some form of warranty on his work.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix kitchen units.