Edit: Yeah I guess the live chat need some improvement..
Not only Betbolt, but there are a lot of casinos with slow support responses, including BC Game. I assume their support team size does not match the user base size, which is why the support cannot handle all the support inquiries at the same time. Or, probably, their support team is too small, so sometimes they leave the live chat without an agent.
I would recommend they hire more support employees to provide better quality support. I see all the issues with the players were solved already. I hope they will continue to provide good services to the players.
Bringing a little of my little experience with the support area, it is interesting to always put a percentage in relation to the number of active customers who opened complaints and draw an average to know how many employees the support area needs to serve these customers in the most extreme cases.
But as you said, all complaints were answered here, showing the efficiency of the casino. But there is always room for improvement when it comes to customer experience.