Customer service- poor

Poor customer service. Couldn’t change contact details with 3 different agents who kept on sending me verification emails but with no assistance after with my query. They keep sending emails that your query has been resolved successfully for audit trail purposes but still on the app my contact number is still updated. 2nd issue, can’t pay the outstanding balance on app because it buffers and when I sent a request they did the same thing as the contact details query. They can only be emailed but not be called.