Poor customer service on personal loans

Fnb has very bad customer service. If you want to take a loan, I wouldn’t recommend it with them. I took a loan and changed the date to collect their money by 5 days and I tell you their interest rate for that month went extremely high. The consultant that helped me changed date did not inform me about certain information. I then called in,close to an hour on the call with another consultant who could also not help me and said she will get back to me till today. ( its been a month now) I sent them an email and they responded to nothing that I enquired about. I want to believe that they wrote off my enquiry as resolved. One of the other things concerns was that my interest rate keeps going up even when I pay consistently every month. The consultation that last help me akso saw it and sent an email to head office but no response.