Poor customer service

Payment was done with ref no the number of the cellphone instead of acc number. Now the robot call harasses me for outstanding amount although I ve sent proof of payment for allocation in 3 different occasions. It has heen at least 2 weeks that I m sending emails to finalise this but reply emails state that payment is allocated, although robot call continues and says "amount is due" ...customer service is not at vodacom reach ! Also agents provide **** assurances that it is done .....and the saga goes on ...what a waste !!!