Dunlop sells me defected tyres.

Good morning I have purchased a set of Dunlop tyres recently. (205/40/17R SP SPORT 7000D) The tyres are defected, They have wall separation,and that is very dangerous and they have about 95% left. The tyres were bought from Best drive Pinetown Durban. I have call Best drive and Dunlop, No one wants to help me. I am driving the car at 60KM/H because its my only mode of transport and i do not have the money to replace them. I feel unsafe driving my vehicle. Dunlop needs to replace all my tyres, or give me a refund as i am not happy.

Thank you