Russian gas monopoly Gazprom has refused to abide by a Stockholm arbitration court ruling that it pay Ukraine $2.6 billion in compensation for failing to supply transit gas, state-owned oil and gas company Naftogaz of Ukraine reported late on March 27.

Naftogaz said that during the negotiations with Gazprom, the Russian company also “made it clear” that it would not resume gas deliveries to Ukraine with a $500,000 price reduction, as was ordered by the Stockholm court in December.

Both arbitration awards are final and binding on Gazprom, the Ukrainian company said, and added that Gazprom, in fact, wanted to amend the Stockholm decision or terminate the contract with them, according to KyivPost.com.

But Naftogaz “finds this position unacceptable and has rejected Gazprom’s proposals.”

“Gazprom’s refusal to honor valid arbitration awards by an internationally valued and respected commercial arbitration tribunal raises serious questions about Gazprom’s trustworthiness as a partner for the European gas industry,” said Naftogaz’s commercial director, Yuriy Vitrenko.

The parties agreed to have another round of negotiations in April.