Bad service from Parts Department at Lindsay Saker VW Midrand

Bad service from Parts Department at Lindsay Saker VW Midrand. I went to buy a battery for my 2015 Polo VW car key on 15th March 2021. I was given the 2032 key instead of 2025. After replacing the battery, the car kept on sending out a warning that my new key battery needed to be replaced. As I was still having the old battery, I went to Dischem to check out the exact same battery of which I bought two in a packet for R33.00 instead of the 1 i bought at VW for R118.00. The new battery I bought from Dischem is working very well as it is a right size or model.