Telkom using our money

So an update. Telkom double deducted premiums last week. Their error. Went into branch. Was told it would be refunded after 3 days. 7 days later I go back to the branch to be told the money was credited to my account but now only they would refund it to my account. So after 7 days we wait for another 3!!! Alot of interest they gather with our funds conveniently. TELKOM YOUR SERVICE IS BAD