Appalling Service - Lack of Professionalism

I am very disappointed with the accounts department at Sparks, their service is very appalling and their staff has no care whatsover. Firstly you call them and hold the line for +-5 minutes (on every call made), then they don't follow the correct process in trying to obtain information regarding your query. I mistakenly paid the school an amount of R6 700 on 11 October and requested a refund, which they informed me would take 14 working days. They refunded me R550 on 06 November 2019, when I called to find out why they I was informed that they had billed me for 2020. However my child no longer attends their school and hasn't been for 2019, I was informed they would rectify their error urgently and refund me. Today I contacted them again and spoke to Tebogo, who informed me I will only be refunded in 14 days again AT THIS STAGE I WAS VERY LIVID. I told her their service is uncceptable and that I will report them to Hello Peter for bad service, she calmly said "okay". I asked to speak to the manager (who conviniently went into a meeting, but she was communication with her in regards to my refund). The manager Tashi Nadas, was meant to get back to me after her meeting, but she never did. I am still waiting for feedback and still being told, I will only be compensated next week. I am appalled that they are telling me this, but when you owe them they are quick to call you. I would NEVER recommend any parent to enrol their child at this school, your service is unprofessional and DISAPPOINTING!