Damage to glass door due to incorrect listing specifications

In December we purchased a microchip cat door and glass door mounting, for use in a set of frameless stacking glass doors. The Takealot listing for the glass mounting specified that a hole of 21-26cm diameter would be sufficient for using the product. We cut the hole at 21.2cm to allow a little extra. When it came time to install the cat door in the glass, it was clear that the hole was way too small to fit the door. We double checked the listing again and there it was in black and white - 21-26cm in diameter. I logged a return for the mounting, and the cat door, which was rejected as too much time had elapsed since purchase. I managed to get the direct number for the pet category buyer, Dyllan Ocker, as the service at the customer service centre at Takealot has been dreadful of late and the issue would in any case need to be escalated to him. The buyer's primary interest was his email address - he demanded to know where I got it from. He directed me to log a return, and to follow the "correct channels" for communication. I contacted the customer service centre, who kept repeating over and over that they would not make the return, and ignored the information I supp**** about the damaged doors, and the screen shot I had taken of the incorrect listing. I contacted the buyer again, only to be asked again how I got his email address. He said that if I would not supply a customer service ticket number, he would help no further; that he was entitled to know how I got his email address, and that he didn't appreciate that I hadn't told him. I supp**** the ticket number, but he said he "couldn't promise anything" - he, the category buyer! Three days later, on a Friday night, I received a phone call from Keenan Pillay, a customer service manager who seemed distraught over the service I had received. He was most concerned about a "damaged relationship" between Takealot and me – I have spent several thousand with them over the years and promoted them widely. Keenan assured me that he would arrange for the returns to be accepted, and pursue recompense for the damage to the door. He said he would revert on Monday about this. On Monday I received an automated email, to say the returns had been accepted. Another customer service agent phoned to assist with this, but the issue with the door was left unaddressed. It is now Thursday, and I haven’t heard a thing from Keenan. I have phoned and left messages for the past 4 days; he is always either “on another call” or “at lunch” and my calls are never returned. I have also emailed several times – and no reply. Needless to say, Takealot has lost me as a customer. I have always valued them for their client-first focus, on basis of which they make bold marketing claims. The door is now ruined; the glass has been tempered so the hole cannot be enlarged. It will now have to be replaced. I have checked the listing each day – nothing had changed until today. The stipulation is now 21.2cm – but this is still insufficient for the mounting. Interesting that there was time to make this change when there hasn’t been time to reply to me. I guess this is about getting "ducks in a row". I did take screen shots of the former listing, fortunately.