HOA question for those that invest in Condos

Hi, everyone! Quick question for everyone on here that invests in condos and is used to dealing with HOA's

I've had a plumbing problem with my unit a few times this past year. Once earlier in the year and again last week. The thing is it's a problem with the building's plumbing...not my units. It's a 6 unit property and it's getting clogged near the main drain and under my unit. My unit is on the first floor and closest to the main drain so my unit is the one that backs up. I've paid the plumber the first time and this second time as well. My question is should I go after the HOA for a full refund? Isn't this an HOA problem? They said they can help but I don't feel like that's enough as this has nothing to do with my unit. May I add that people upstairs keep flushing paper towels and baby wipes down the toilet and that's what gets it clogged up.

Please let me know your thoughts. 

Thank you, 

Kyle