Please can I have my R595 back (asking nicely before taking further steps)

Tried Rain's so-called 5G home WIFI, which was far worse than my current 5-year old 4G device.. download speeds were ok, but upload speeds ridiculously slow. After being assured it takes 24 hours+ for SIM to be activated to enjoy the faster speeds, I left it as instructed and rechecked a day+ later... However no change whatsoever, with no solutions, so I cancelled my month to month contract, returned device and all particulars to the store as instructed on 2nd March. Also got acknowledgement from Rain that they'd received the device and contract was now cancelled on that date. However, it's now over a month and they still have my money. So, Rain, when can I have my R595 back? or is this your business model and you collect the interest on thousands of customers like myself and only return customers monies months thereafter (if at all)?? I'd like my money returned within 24 hours - it's over a month and counting...ridiculous! & your call centre is pretty useless too; always technical issues midway through calls until the customer hangs up so that the call centre agent who ghosts you on the other side of the call can't be found out....