Hardware Centre Randburg

I ordered 2 bandsaw blades to be made up, the salesman charged me R70 a blade. Invoice 135102 made out as 2xR70. R140 total. I paid this. one blade arrived a week later, I was then told the blades cost R140 each. so I paid a further R140 cash, no invoice was given. I checked the blade and I had measured incorrectly, I contacted Marko, the sales person and told him to hold off on ordering the second blade, this was a saturday. I went into the shop on the monday and asked for 2 x196cm blades. 3 weeks later, I go to the store and get told I owe R260 for the 2 new blades, R130 each. I had already paid R280, granted the wrong blade is for my account, but the sales rep had not made any further invoice or noted on the first invoice that I had paid for 2. I walked out the shop furious with the 'íncorrect' blade I had paid for. I am quite prepared to pay the difference. total cost R400, already paid R280. difference R120.