am not happy with standard bank service

I Sibongile Ngubeni I took a loan with standard bank of R48 700 in 2020/07 for 5 years. I was paying weekly R380.23 installment and i have never skipped a single payment but i would receive calls stating that i'm in arrears, then i will make a payment arragement. i changed to monthly only in 2025. come to surprise i was contacted that my loan will initially end in APRIL 2026, i dont understand and worse my outstanding 17K and i have payed R 90114.23 since 2020 till now. I've been calling and i'm being sent from pillar to post i can't get help. i logged a query twice now that i need my term loan agreement and i was told that i need to call back on friday, this is not a pleasant custumer service. i just need to know why i have to pay the loan with over 100% interest. this is not making any sense i need this query to be resolved urgently before this month debit goes off. IM NOT A HAPPY CLIENT AT ALL.for more infromation you call me on ***.