telkom won't set my spend limit.

Acc ***. Mondo phoned me to upgrade my telkom mobile account. The phone sales person told me to contact mondo to set my limit. I cannot get through by phone so I emailed them. I received a reply to contact telkom. I cannot get throught to telkom either so I also emailed the. I cannot set my limit on the telkom website because it does not save. If my contract goes R1 over my R1 limit i will close my bank account so you mondo/telkom does not ***** any more money from me.