Choose your answer: is the following review positive or negative?

Went back there because I had a flat tire and was towed in. They wouldn't honor warranty on tires. Said had too many miles. I had spent $2100 on rims and tires there. They tried to pressure me into buying sumitomo tires which are garbage. I drove across the street to discount tires to avoid their bullshit. They are horrible. This happened 1 1/2 years ago.

Choose your answer from: a. negative b. positive
a.