Rude customer care consultants and BIG ********

I purchased an order online and bought a buy 1 get 1 free. Paid for my order and delivery. No communication was being sent while I waited for my order so I’d track my order from my app. Finally an email was sent for collection and a next email saying my order was collected all this happening when I’m home. Next day I went to the store showed the both emails they looked for my order and it was in their cabinets. I opened the order and there was only 1 item receipt showed 2 of the items i had ordered but indicates that it wasn’t packed. I asked to return my order and they refund my delivery fee too because they delivered partially what I had ordered they refused and said we can give you a voucher you’ll receive it in 48 hours this was on the 14th June 2022. I called Monday the 20th and still nothing called Tuesday the 21st I was given a voucher number and I was told to check my emails I must have received it by now, I checked emails nothing I even checked my spam as advised still nothing. Friday the 24th I go to purchase from the store since I had a voucher number. I get to the store they require a unique code which I didn’t have I went home having purchased nothing. I called MPR today the 25th and the first consultant hung up on me while she put me on hold. Called again second consultant was rude and giving me attitude. Eventually she tells me the voucher number I have was invalid and was used in pmb. The nerve. I asked to speak to person in chatge to find out what really is going on I was told she’ll call me rather she’s working from home and unable to connect me to her and this is the second time I ask to speak to a supervisor and told the same thing worst thing they don’t call me or anything. I’ve been on hold for more than an hour now and no one seems to be assisting me. Monday you are going to be hearing from my lawyers.