Redknapp explained his decision to keep taking Defoe off last season by saying "I wanted more from him than he was giving me."
"I don't think Harry was being fair," said Defoe.
"My performance in the win against Chelsea was probably my best of the season. My movement was good and I felt sharp.
"I injured my hamstring, which set me back a bit. But I got myself fit again and got back in the team."
Defoe expects to hear soon from Redknapp, who has praised the striker since he has been in South Africa.
"I have played with Harry almost all my career and he has always been fantastic with me, phoning me regularly, ever since I was at West Ham," he said. "I am sure he will be in touch soon."