Need help with washing machine..

Have you tried running a cycle with very hot water and some bleach and/or baking soda.  Should take care of it I think without needing to waste money paying someone.

As romanic suggested, but maybe buy some HYPO, it is super strong and super cheap, the stuff in the brown bottle, all liquid, usually under 100 forints a bottle, watch out, don't spill it on clothing.

Also maybe some washing powder in then mix with hot water. If not, call up your super and tell them the washer is a mess.
If all else fails try finding a local "Bubbles" near you. We just took my cousin from the US to one near us, first time we used them, for 1,000 forints a load it included the washing soap ,they have dryers for 1,000 forints too. My husband said it washed everything really nice and really fast. Takes about 12 kilos per load too.
Thinking of using them myself, just lazy to carry dirty laundry over there right now, Plan on using them in the winter because they have a dryer.

The washing powder is called, Varazs Soda,we add this to our washing cycle, on Tbs. per load.
There is also a dry mix called Triso which you can mix with the washing powder, use hot water and leave it sit overnight without any clothing, rinse it all out. You can find these items in most of those Chinese shops or the I Euro shops.
We usually use a bit of white vineger in the final rinse.