CoH cape mission

I went to Serg and started the cape mission. I defeated 30 Tsoo but now when I click on Serg, he just says "Time for a make over". I can't get any cape at all. Does anybody know whats going on or what I need to do?

Thanks

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50 EM / SR Stalker
50 Spines / Regen Stalker
50 Claws / SR Stalker
50 DM / DA Stalker
42 DM / EA Stalker
40 Nin / Nin Stalker

Serge gives the costume mission, not the cape mission.
See the city rep in city hall in Atlas.

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Thanks so much ! Been playing since issue 2 and I still learn something new

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50 EM / SR Stalker
50 Spines / Regen Stalker
50 Claws / SR Stalker
50 DM / DA Stalker
42 DM / EA Stalker
40 Nin / Nin Stalker