Terrible Service SpecSavers Knysna

I ordered contact lenses (with full payment) from SpecSavers Knysna in January 2023 and was told that it would be ready within 4 weeks. After following up I was told the lenses had arrived and went into the shop to collect them. On arriving I discover they only have received the left set and have not received stock from their supplier but it will arrive within 2 weeks. After 2 weeks I follow up and still no news and no reply from them after I follow up again after 2 weeks with no reply. I was then notified 3 months later in April (after many follow ups) that my lenses had arrived - but when I went to collect they had again made a mistake and only the left lenses arrived and I had made the trip in vain. After enquiring regarding a timeline they said they have no time frame and questioned if I paid for both sets and if the mistake was mine. I sent them the proof of payment which I made in January already but had no reply. Then I cancelled my order and have requested a full refund but had no reply from the Knysna branch. And this after I found an optometrist in George who has my order and could fill it within a few hours. I stand by my request for a FULL refund from Knysna SpecSavers before close of business today as I will no longer support them and their poor service.