Bartomeu is adamant the €222m world record signing went back on his word.
He declared on TVE: "Officially, we only found out when he said he was leaving, although at the end of July we believed he was not going.
"His father told us that there was no problem. Our self-criticism is to recognize that we believed Neymar - father and son - who told us that they were not going to leave.
"Cesc, Alexis and Pedro were honest and said they wanted to leave Barca."