The Trade Union Congress of Namibia (TUCNA) has also called on MTC Namibia to give permanent employment to those who have been working on contract for years at the call centres.

The union says it has received several complaints from MTC's contract workers at the call centre.

Some employees have allegedly been on contract for more than five years.

This, TUCNA president Mahongora Kavihuha says, contravenes the provisions of the Labour Act.