Netflix complaint: Refund

I have filed this complaint on Complain.biz. This is the first time I have ever complained on here.
We have been overpaying since September 2019 for our Netflix subscription. I would like the overpayments refunded back to our account please within 48 hours.
I spoke to a guy on 0808 1965391 on Monday 3rd January who basically kept putting me on hold, he kept pressing his phone buttons and this caused lots of loud bleeping to my ear, he paused a lot and spoke in broken language to be honest, the whole conversation was terribly dis jointed and slow. He said there wasn’t a supervisor I could talk to, and that there was no email address that I could complain to!! After some arguing and putting me on hold even more he said he would refund £13.99, he hasn’t done this within the last more than 48 hours now. It isn’t an acceptable amount anyway, and I asked for £28.00, as I would have left it at that! He has chosen not to refund anything! If Netflix refund this amount and if we stay with Netflix our subscription must be lowered to the correct £9.99 standard amount for only 2 TV’s. So, if the following is not refunded then I will most likely cancel my subscription altogether and go to Amazon Prime similar. By my calculations I am looking at July 2021 to and inclusive of December 2021 overpaying of £4.00 x 6 amounts, plus September 2019 to and inclusive of June 2021 overpaying by £6.00 x 22 amounts, so totals £156.00. I dislike when a representative says they will do something and they don’t!! There we have it, we only had 1 TV with Netflix on it up until a year ago, and now we only have 2 TV’s with Netflix subscription! We never asked for our subscription to go up on a monthly basis, it was simply put up without our agreement. We don’t own 4 TV’s or have 4 TV’s and devices in the house so none of this on at all!