Mis-sell and broken promises - now I'm paying

I cannot be any more frustrated with their service. I was missold a data SIm card on the pretext that it could be a second data SIM for my card using an adapter on the 3rd of March when it arrived I very quickly realised this was not possible and checked to make sure that it was not possible with Vodacom. I then called Mondo to cancel the sale make sure the card was not activated and they would then collect the SIM card and the "free router". I was told they would arrange for the same courier to come back and collect it. This was well before the lock down started.

Well - the Sim card was activated. Despite promise after promise of they will come to collect it, still nothing, and the data package is being charge to my Vodacom account every month. Vodacom's response - only Mondo can resolve the issue from their side.

Again more calls from my side and promises. The last one being on the 4th of May - as of yesterday 15th May still nothing!