Lack of knowledge in terms of providing Paid-up letters to customers

Getting a paid-up letter from Vodacom is worst than anything that I have experienced so far with any business especially an established business like Vodacom. I have paid the Settlement amount on Wednesday, proof of this was sent on Thursday, 25 November 2021, and haven't received the paid-up letter. Being sent from pillar to post should not be a surprise to anyone but things should start shaping up when dealing with a manager. Not in this case. I am still waiting for the paid-up letter but I have made peace with the fact that 24 hrs might be interpreted differently by different people.