how can i fix the program selector on my indesit washing machine?

the programs selector on my indesit washing machine no longer selects the correct wash program, and also the drain function to drain the machine also has stoped working, so the machine fills up,but just goes in a continuios nonstop cycle, is this a problem with the programing card or an electrical problem? can it be fixed, and if it needs a spare part where can i get it from?