That s how it works. They hire higher ranked members and pay them to defend themselves and attack the customer. Then you are not fighting against 1 sportsbook but against a whole professional manipulating army.
Maybe try
Cleobet.ioAt least they are not using an army and they seems a quite bookmaker.
They quitely have shady reputation and I suggest to make things clear on their side before going on them there are other reliable site which is good for now so better go with already tested rather than new with questionable reputation since instead you enjoy betting on your desired team you will end up getting head aches if you get compromised.