defect tyre

I had an incident with my Dunlop tyre on 23/02/2015, I was driving home on the freeway when my car started to vibrate since it was unsafe to pull over on the freeway I drove to the nearest garage and when I got to the garage I saw the tyre had lots of bulges. I did not hit any potholes or curbs, I have pictures to prove this. It so happened that morning I went to the garage to check my tyre pressure, so I took tyre to Dunlop on Umbilo road to check the tyre. That guy told me that it's my fault and I drove the car with no tyre pressure which is not true. The only reason why it looks like that because I had to drive the vehicle to the garage with all bulges and if I damaged it then why it's not like that all around the tyre. If the tyre got no leaks then how am I going to drive with a tyre with low pressure? The bulges blow at a certain point and its not at the same line as driving the tyre with no pressure. This is not acceptable, I had to go through so much of inconvenience and it cost me so much of money. I even took it to another tyre company to check the tyre and they said its a manufacturing defect. I contacted Dunlop customer care on the 26/02/2015, still never get any feedba