I am not sure how the tow-truck/driver could cause damage to the suspension. I do know that unless all four wheels were off the ground while towing, it can cause damage to the transmission...

I had called Assist in my last vehicle as the battery had died in winter - due to a mysterious battery drain. They told me it would be a 7 hr wait to get a boost! Needless to say I called AAA on my own!

Sorry to hear, but I wouldn't let them get away with it! Any diagnosis etc. should all be covered or re-imbursed since it was caused by the defective fuel pump in the first place or you wouldn't have to get it towed...

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2008 X5 4.8i - Jet Black / Black Nevada Leather / Specs: Every possible factory option