Debit Order higher than the agreed monthly instalment

Disappointing outcome, I recently took up car insurance with Pineapple Insurance, everything was done over the phone and i have the recording to confirm what was agreed. The final quote for my car insurance was R709, however i was charged R901 in my debit order, it has been over a month and Pineapple has not been able to fix the error, today the Pineapple consultant helping me said there is nothing she can do from her side as it's a system issue showing the wrong address. Now i am paying for their mistake or system error and no one has given me a call to even apologize or talk me through the issue.

I want the original amount i was quoted, nothing has changed since i was quoted R709 and i was not informed that the quote had changed from R709 to R901 until the debit order went off.

I have proof of the quote of R709 in the recording. I can’t stop the debit order because then my insurance will be in default and i need my insurance. I would not have taken the insurance up if i had known it was R901 as its too expensive for my small.