Wrong service interruption

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 The above SMS is the forth received by me in March. I paid one year subscription from 01 April 2019 till 31 March 2020 but according to Multichoice that payment has no validity. I think that it's better to talk to a wall rather then Multichoice as my numerous complaints are not acknowledged.