Hi Tessa and Metro, I understand your frustration but Concepta is not a store that is open 24/7. He will respond when he has time and WILL look after you.
These projects are very long. You have to get the parts from the factory, send them to your watchmaker, get everything together, please incoming mails from customers, collate money, slowly ship out watches as they come in. Big process with a lot of work.
It should reassure you that he does not take on a million projects at once, this would overheat his assembly line from A to Z.
Chase him occasionally and he WILL get back.