Doorbell 2 Warranty

Have 2 doorbells, one is working fine, the other had some lines going across the video at night, put it down to battery/wifi issues.Just came home today and realised I wasn't getting pings for coming in - thought might be phone on silent or needing to login, no - the doorbell is offline, wifi or battery naturally. Tried 3 batteries, even charged one up and the thing won't turn on.Luckily its inside its 1 year warranty (just over 2 weeks left!) but its actually been offline for about 2 weeks already...Come to try and get some help/chat but live chat just says its unavailable currently and its not giving me any other options - when I do get in touch with someone I expect the warranty period will be over it won't be honoured.Is there a number or any other method I can try?I'm in the UK.Thanks in advance.