the bend on the Fin is not normal, also in one of the other pictures where part of the fin is closer to the one next to it is also not normal... all the fins should be parallel and equal distance between them all the way around... at this point in time it is your choice on what to do...
it is my opinion that it it is only 1 fin it is not that big of a deal... it is is more might consider sending it back and get a replacement for the damage.. I do not know how long this would take though it is a consideration,,, it is your call .. i do not think the actual heating element has been damaged