Complaint for wrong service disconnections

DSTV: We've not received your payment and had to stop your viewing. To keep watching, pay R706.54 using ref no. ***0 or click payat.io/dstv/***0 This is one of the messages I'm receiving from Multichoice since January. I paid one year in advance from 1st Apr. 2019 till 31st Mar. 2020. It seems that Multichoice doesn't consider as paid the months of Jan, Feb, and Mar of each year. Is anybody there able to explain to Multichoice that payments of one year in advance not always means from Jan to Dec? Is anybody there at Multichoice to feel ashamed for the bad treatment to customers?