MTNActive Portal issue since April 2021

I've had a case ,amongst several,that has been open since May.I am an MTN business client and upon cancelling one of my contracts in April,I was unable to manage my remaining contracts on the MTNActive portal.I can login however I am met with the following error once logged in "Error An error has occurred. Please contact Customer service. " because of this I can't access anything on the portal.I've called,I've e-mailed and to date this still hasn't been resolved. Now I only have one contract remaining and still have issue. Account number A***