Jet account

Hi on the 13 November 2022 i opened an account at jet in Dobsonville mall,it was on sunday and they were rushing to close the store. The guy who helped me told me m gonna pay R35 every month i qualified for + -R1170 credit account,i did not agree on having policy and things that gonna make me pay more. Then first month i paid R35,second month it went to R120 but i kept paying until last month when i saw my balance it didnt change and they send me messages saying i must R130 i paid because i dont want it to affect my credit score,fine thi beginning of this one it says R135 every month i receive notification with different amount,i decided not to pay then they called i told them i cant pay because of i cant pay for something i dont see,i ask them to check whats happening,they told me i have policy,jet magazine and other thing i dont remember what was it,so i ask you to help me because i dont want to pay this account anymore they must take the money they took for those things i never agreed to pay and pay the account if possible they must close the accounts. Please help me