Refusal to hand over tapes
Unfortunately the "News" to Ukraine refusing to cooperate is part of the Maskirovka from Russian media system. Intentional with government sanction, your guess is as good as mine.
However it's not factual and a downright lie that Ukrainian ATC or UKATSE would not have handed their ATC recordings to the investigators.
An exert from the interim accident reports states:
The replay of the CVR matched ATC communications with the aircraft (see ATC transcript). The recording also included crew communication which gave no indication that there was anything abnormal with the flight.
Indicating that Ukraine would have provided the transcripts.
Further
2.5.4
ATC transcript UkSATSE provided the recording and a transcript of the radio (RAD) and telephone communications regarding flight MH17.
Spreading ill educated lies, origins of which are from the spam factory is neither helpful nor does it contribute to the discussion but rather diverts the attention away from actual facts and what are known as facts. Same category as the SU25 shoot down theories, a fabrication.