Misrepresentation and incorrect information provided by their staff has led to harassment

I cancelled my contract with Netstar, and a month later they debited my banking account about R150* not sure - and I logged a dispute with my bank and reversed the payment. On the 24th July 2019, a lady calls me around 4pm on my cell phone and tells me that the settlement for the contract with Netstar is R296.02 and will be deducted from my bank account with Ref: Hybrid or something to that effect, I then asked the lady is this the balance for Netstar and she confirmed more than 3 times because I asked her so that there's nothing else I should pay and she again confirmed and even sent me an sms to confirm this and even sent me Netstar contact details and asked that I email a confirmation email to cancellations department. On the 29 July 2019 they deducted their R296.02 that was done, but then another debit order of R400* and some change is debited from bank account with Ref: Netstar, so I reversed this transaction with my bank because I thought this must be a mistake because I spoke to someone and we finalized this issue.

Today 15/08/2019 at 2:09pm a Sibusiso calls my cellphone to discuss the balance on my Netstar account, I ask him what balance and he says there's still abalance and doesn;t know what the other lady was talking about.

I have requested that this man Sibusiso go and listen to the recordings on the 24th July 2019 and then get back to me, he just said we will deal with you - meaning what exactly? Is Netstar threatening me? Has Netstar went into their call recordings and deduced that I have been provided with false information? I am a victim of harassment from this company because they can't communicate with each other and probably someone didn't do their job right.

This needs to resolved Netstar, I was told I only owe a balance of R296.02 - I would like to know where this additional R400.00* comes from and what is it for and why wasn't I told about before?

I am only asking this interest sake not because I want to pay it, according to my knowledge and the information provided by a Netstar representative I do not owe Netstar anything.