ETS Complaint

On May 29, 2019 I placed an order in my ETS account for a GRE test on July 3 2019. On the afternoon of June 29 Saturday I received an email from ETS out of the blue, claiming my test has been cancelled. I immediately tried to get in contact ETS, but their phone number didn't work as it was a weekend day. I had to submit a message through their online form, informing them I didn't request the cancellation and asking them to make sure my test will go on normally. 12 hours later I received an email reply from ETS, saying my test was cancelled on "June 30". Apparently ETS does not have a well-organized record and couldn't keep their story straight. How could the test have been cancelled on June