With Poland, it was more due to internal political need to be seen as hard on Russia (and please look the other way as we buy coal from Donbas). Another leg of that strategy was buying LNG from USA, which turned out to be American companies buying russian gas in St. Petersburg ¯\_(ツ)_/¯

With the contracts, the current ruling coalition sold people the idea that they "got back" money from Gazprom over high prices of long-term contract when spot gas prices were lower. This, indeed, led to a considerable refund - but also meant we don't have guaranteed gas prices anymore, and now spot prices are much higher than they were when they renegotiated out the long-term contract ¯\_(ツ)_/¯