Bad service response to faulty order

I ordered calming tablets for my cats, everything was fine until I opened the box and saw a packet of treats, which I did not order and a message written on the bottom of the box explaining that the packet with the tablets in is damaged and that is why they packet kn the treats too. I thought "what a nice gesture!" But then I opened the packet with the tablets and there were 1 blister of 10 tablets missing, it is supposed to contain 30 tablets, 3 blister packs of 10 each. So I let them know, send images of everything, a response saying they are waiting for head office and then nothing. This was expensive, almost R600 a packet, that means that not getting 10 tablets is a loss of almost R200. But what is worse is that they are now completely ignoring me.