Inconvenient Pack My Meds and PayGate Glitches

I've been ordering my meds through Pack My Meds for a little over a year now and I've had instances where I've had to pay a levy and selected to do so online through the link Dischem sends me via WhatsApp. However, I've had issues with paying online. Sometimes the payment is successful then the delivery driver arrives with a receipt that states the levy payment is cash on delivery (when I've already paid online!). This leaves me (the customer) and the driver in an awkward position because I want my meds (because they've already been paid for) but he can't give them to me because, as far as he's concerned, I haven't paid for them. I've recently had to pay the levy in cash to the driver when I already paid online via PayGate. It seems like PayGate doesn't immediately notify the stores that the payment was successful. And even though the payment was successful, whether I get a notification from PayGate or not is inconsistent. Sometimes you do and sometimes you don't. Yet the bank releases the amount every time!

There's a problem between Dischem and PayGate's systems and I feel like I'm being made to pay for it. Pack My Meds has been working so well for me so far, but I don't think I'll keep using it if I have to pay medication levies twice. I'll skip the trouble and go to my local Clicks pharmacy. Maybe they have better systems.