I ordered some rat bait and lockable boxes. Both turned out to be very good quality and I couldn't ask for more.
With a pandemic and lockdown going on, these took a week to arrive. But I inquired during that period and was treated with respect and courtesy. The time would normally be faster but this was still, in the circumstances, fast enough.
Great product and service.
Answer: There's an online contact form and email address, I used these. I cannot answer about phone line. Customer service got back to me in a timely manner and were very professional.