disappointed with service and quality of products

I RESPONDED TO AN AD OF THE WOODEN DOORS ON SPECIAL FROM THE HOMEMAKERS FAIR. THEY WANTED FULL PAYMENT WHICH I DID. ON 3 MARCH THEY CAME TO FIT IN THE DOORS. I WAS NOT HAPPY WITH THE SERVICE. HOWEVER THE NEXT DAY WE NOTICED THAT THE PANELS WERE SPLITTING & I FOUND THAT A BIT STRANGE SO WE CALLED THEM AND THEY SAID THEY WOULD SEND OUT AN INSPECTOR TO TAKE A LOOK. HE CAME 2 DAYS LATER AND WAS ALSO SURPRISED TO SEE THE SPLITS. HE TOOK PICTURES AND SAID HE WOULD LOOK INTO IT. THEY CAME BACK AND TOOK THE ONE DOOR AND SAID THEY WILL REPLACE THE PANELS AND BRING IT BACK. THEY DID THE SAME WITH THE OTHER DOOR. THEY STARTED SPLITTING AGAIN AND I WAS VERY UPSET. I SENT THEM A MAIL REQUESTING A FULL REFUND FOR SUPPLYING FAULTY PRODUCTS. JAQUE CALLED ME TO SAY HE HAS FOUND THAT SEVEN OF HIS DOORS HAVE A FAULT AND THAT HE WILL REPLACE THE PANELS & WILL COME PERSONALLY TO TAKE A LOOK TO ENSURE THAT THE DOORS ARE IN GOOD CONDITION AND FITTED CORRECTLY. HE SAID THIS ON 2 OCCASIONS TO DATE HE HAS YET TO COME. ON 23 MARCH I NOTIFIED THEM BY EMAIL THAT I AM DISAPPOINTED AND WANT A REFUND. ALL THEY DID WAS TAKE THE DOORS AND BRING THEM BACK FAULTY CAUSE THEY ARE SPLITTING AGAIN. I JUST WANT MY REFUND