LTE home ****

I took a LTE package from MTN on the 27th February 2024 of which I am told and even on the contract it stipulated that I pay in advance of which I paid and everything went well, now come this month they send me a billing of R533 and say I need to pay for April and may at the same time of which I don't understand, no one is willing to explain to me as they send me pillar to post call to call to people that say I need to speak to the director and that director they can't transfer me to