Hello everyone.....I bought this new age power bank 8500mah on jumia and its been working fine for the past one month...suddenly it stops charging and I have tried all kinds of chargers to get it to work but still the same result....i even went ahead to buy a brand new charge and usb cord that charges my phone at super speed it still wont charge i'm preparing for my final exams and bulk of my works are in pdfs and doc files i'd need more than nepa to study....please I need help here can I be fixed ?

Take it to a phone engineer na