Regarding Antminer spares. https://www.antminerdistribution.com/ is EU based and reliable (bougth a miner back in 2019), more expensive then most of asian sites, but if you do your purchase trough a company they will deduct the VAT. They have both miners and spares availble, mostly on request though. I dont know if tare afiliated with Bitmain, or not.
Would you care to provide proof of payment or some sort of proof that you successfully bought miners from them? They are not affiliated with Bitmain and they always seemed like a scam to me. Sometimes they had better prices than Bitmain themselves.
I will try to contact their support to see if I can get in contact with someone from Poland.
go to this page >
https://www.zeusbtc.com/Repair.asp, scroll down and you will see a list of some cities/countries, looks like you have to keep your contact information and they should contact you.
The site also mentions
Attention: The miner repair points shown on the map below are independent individuals. This site only offers a free display. Please contact the maintenance point for specific matters. If there is any dispute, please resolve it by negotiation. Any consequences will not be related to this site.
So it doesn't seem like they are a branch of Zuesbtc, but I can only assume that Zeusbtc must have done at least a basic check on these guys to confirm their integrity, some of them might have got some training in China from Zeusbtc, I tend to think that they can be trusted, but I would still. deal with caution
I'll check with them, they might have something I need.