Brittney Griner's wife, Cherelle, is absolutely livid she didn't get to talk to the WNBA superstar on their 4-year anniversary this past weekend ... claiming the U.S. government botched a long-awaited, scheduled call between the two.
Cherelle says Griner -- who recently had her detention in Russia extended yet again by a court in the foreign country -- tried calling nearly 12 times on Saturday, but did not get through to her, according to the Associated Press.