Dishonest and unhelpful

I came in to exhange my Model 30 Sodastream bottle for a full one. Leon the manager gave me a Model 60 bottle (Which cost me R130) which does not fit on my machine but he never informed me that the tread on the model 60 bottle is different from mine. So in the process I almost damaged my machine. I then brought his model60 bottle back to get my model 30 back with the original invoice. So Leon then told me that he hasn't got my bottle(which is dishonest) and then he just gave me a refund. Now I have my R130 back but not my bottle. The problem is that I now have to go buy a new bottle which cost R260 (thats double he gave me). He should've given me R260 instead of R130. Thats deceiving and dishonest.