Where is my (MRRN-T6VWX-QQ85) right product?

I ordered Brother 539/535 Ink Cartridges on May 16th which was delivered 10 days later. Turns out they had delivered a completely wrong item despite having a sticker on the outside that says it's the item ordered. I called the call center who advised me to fill a return form online and I indicated my preferred outcome as replacement knowing too well that to have my account credited and then order again my take me another 10+ days. On Friday the 2nd of June I received texts being notified someone came to pick up but I wasn't around which was a lie. A fter reaching out via emails and calls, someone was sent to collect & replace the item as I had indicated on my form online a week later only to be notified that he's only come to collect. It's quite ever since then and have no idea when I may be receiving the item and neither do the call center people knows meanwhile my work is piling and hitting. If you can't replace, why giving it as an option? I should have been refunded upon collection but you gave me **** expectations. Very disappointed in handling of returns.