I am no expert, but maybe they are one of those shops that just won't do something less than absolutely perfect. Even if it costs hundredes of dollars extra. I'd shop around a bit, especially if you're on a budget.

Reminds me of the time my wife managed to get a roofing nail into the edge of the sidewall of a brand new Bridgestone. I mean, they were just weeks old. A Firestone tire shop and a dealership flat out refused to repair the tire, saying it was a safety hazard, etc. I went to another tire shop and they put in a plug for $10. Lasted the life of the car. Go figure.

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Bob Roe
Lehigh Valley PA USA
1973 Olds 88, 1972 MB 280SE, 1978 Datsun 280Z, 1971 Ford T-Bird, 1972 Olds 88, 1983 Nissan Sentra, 1985 Sentra, 1973 230.6, 1990 Acura Integra, 1991 Volvo 940GLE wagon, 1983 300SD, 1984 300SD, 1995 Subaru Legacy L wagon, 2002 Mountaineer, 1991 300TE wagon, 2008 Murano, 2007 R320CDI 4Matic 52K, some Hyundai, 2008 BMW 535xi wagon, all gone... currently
2007 Honda Odyssey Touring, 2014 E350 4matic