I needed proxies to work with Avito. I checked in advance with the operator if they had such services, and they confirmed that they did. I bought three proxies. They function, but Avito refused to work with them - the IP addresses ended up on Avito's blacklist. For those in the know, this is clear. When I asked to replace the proxies or get a refund, I was denied. They explained that the blocking is done by Avito, not by them. Just like that. Even though I specifically requested proxies for working with Avito, this was not an argument for them.