I need my spare key that was never given to me

I bought a car Polo TSI 2019 Model which the lady that was assisting me only gave me one key and promised to give me the spare key its been five years running after them and I lost my key last week so need my spare key now more than ever, I called them in the morning and they told me to take it up with the lady that sold the car to me , who by the way don't work at that branch anymore so i will have to buy a key from them for R8k meaning i have to buy a key that they owe me am asking for assistance.