Customer service failure from Leroy Merlin

I bought a key lock box from Leroy Merlin some time ago. Since receiving the product, I've been trying to contact the company to find out how to set it up. Maybe I'm missing something, but the lack of response from LM customer support is more than enough to stop me buying from them again. The final straw was holding on for 10 minutes whilst a young lady said she would get back to me. Very disappointing.