Lack of courtesy and useless screen protector

I purchased a screen protector for R299 for my new Samsung Galaxy Note 9 on the 30th of November 2018 and it was fitted instore.

I noticed some dust particles on the screen under the screen protector on the 10th of December 2018 and noticed a clicking sound when pressing on the screen. I then went to the shop on the 12th of November 2018 around 13:42PM and spoke to Zinzan who looked at the screen and kept on pressing the screen and said he cant hear any clicking noise and saw the dust particles under the screen protector and said he can remove the screen protector by cant guarantee if he will be able to install it back therefore I will need to purchase another one for R299.

Zinzan said the screen protector doesnt cover the curved screen therefore thats why there's dust particles underneath it and told him this is incorrect as I had a Note 8 with a curved screen and had a screen protector installed and never had any issues and he said he cant do anything; I will have to speak to the manager and said the manager went to the toilet I must wait for him. 10 minutes passed and no manager, I asked him to call the manager and told me his phone is on voicemail and walked away.

I then waited further with no manager on site and had to go to Zinzan once again to ask what the options are and asked him about the return policy and he said they dont accept returns for screen protectors of which I find odd as the invoice doesnt state this. Zinzan just gave me an email address to email his manager.

Im still with a R299 screen protector that is basically not protecting my screen and a basically useless one.

I need this sorted as soon as possible as my screen might be damaged further due to this.

I was told told the managers name is Nasief.