Overpriced plastic spray bottles

I purchase 10X plastic bottles at R40 each for sanitiser from Just plastic in Umhlanga, in Durban, on 21.03.2020. I requested for a refund as I did not need them anymore, before challenging the company that the items were overpriced. I personnaly called into the company the next day after putchasing the items but was refused a refund. I also sent them an email but did not get a reply. Please can you help me.their tel is ***