Payment

I took out a phn at Payjoy,the consultant helping me assured me i was on a monthly contract as i told the consultant i was a pensioner who only has money at pension time,but after i got my phn i was sent reminders to pay weekly. I really need to be connected and has to borrow to keep my phn on otherwise if i dont pay the weekly my phn will be locked. The next pay date is the 19th March which means i will have to borrow again. I called customer support and was told to pay a months instalment with my next payment ,only then can i pay monthly. But i dont have R481 until the 02/04/2026 which is pension. I really am in a dillema.