OR Thambo registered taxis

After being issued a voucher by Com air for a transfer from OR Thambo to Lanseria. We spent more than an hour waiting for a Taxi to arrive while there were 10+ taxis standing in front of the airport. It seems internal politics between the taxi companies or management problems from Com air side hinders any sort of service. The rude and obstructive attitude by the taxi liaison and drivers is horrible. Rather use Uber.