Incredible Connection Damaged my Laptop

On the 16 February 2015, I brought my laptop to Incredible Connection to be assisted to install an anti virus software, Kaspersky. After over 2 hours, I was told the cost will be R200, something not written anywhere for clients to see or said to me before hand. I refused to pay the amount and the manger aggreed with me, that the technician should have explained thos before hand. Because the technician did not charge my laptop, I took it home as is, charged it and switched it and it was frozen. I could not even switch it off. Today I've come back to the store, the technician gives me an attitude about his \gret work"The manager hands him back my laptop and the laptop is brought back to me. I check the laptop to discover that Colin Nkosi"