"Russia claimed Ukraine was not paying for gas, but diverting that which was intended to be exported to the EU from the pipelines. Ukrainian officials at first denied the accusation, but later Naftogaz admitted that because of harsh winter (lower than minus 30C) some natural gas intended for other European countries was retained and used for domestic needs."
If you want to pay for it - go ahead
So they stole billions of cubic metres, and let the conflict escalate to a lawsuit. That is not paying late, that is theft.
And landlords do kick you out when you are sufficient late in paying the rent. What would you suggest otherwise? Enter a relationship therapy with them?
It's clear now that Russia just wants to destroy Ukrainian independence and its culture. And it's using any possible leverage to achieve this.
https://www.wired.com/story/russian-hackers-attack-ukraine/a...
https://en.m.wikipedia.org/wiki/Russia%E2%80%93Ukraine_gas_d...
Of course EU should be seeking energy independence, as US is also an unreliable partner (see Trump).