Sealing was not completed. After several reminders...

Sealing was not completed. After several reminders (telephone, mail and post) nothing happened for weeks. Not even a feedback. After about 4 to 5 weeks then came a call with a request for payment of the balance of 350th sealing we had to reduce damage to the wood, after weeks and expired deadlines, self-organized. Cost estimate of a painter of the sealers makes about 125 to 150 euros if he does it. Since he has to remove the only partially existing seal again to take over warranty for his work. After many weeks came another request for payment of the balance minus about 50 euros due to lack of sealing. So 300 euros. In my opinion, this is out of all proportion and the company showed no goodwill. Where the error lay with you. And at the beginning we tried very hard to get it out of the world.