Calls on hold for too long

My father was assisted with roadside assistance yesterday @15h00pm. Ever since then we have been calling Absa Idirect to make arrangements and we were on hold for 20mins, which then the airtime depleted. Today, I called them again and I waited approximately 15mins again. I am not happy because now my father can't query anything on his policy and if a claim should be logged or not so that he can receive a rental car for the time being.