Was I right in calling her out for using me?

hi…i need some advice ok first of all im 19…well ive been friends with this girl for over a year…we spoke everyday…she wasnt the best person out there put it this way.. ive given her alot of stuf and did her alot of favours and she couldnt even shout me a drink not once!..she always asked me financial questions every 5 minz!!…asked if she could have this…that..in my room. anywayz the other week she asked me to fix her comp i told her i could do it in 2 day coz i was reallly really busy with assignments due that day…she ignors me and calls over 50 times for me to come and fix it “now”…i thought that was damn rude..then she makes me list her phone on ebay…then makes me drive all the way to her house ages away when she has a car!!…then she makes me post it!!…and not even 1 thank u…all she said was do u have a reciept so i could prove to her i didnt keep any money…I FINANLY HAD ENOUGH so i msged her not to call me again because shes really rude and that i know shes just using me…she replyed back with 6 harsh smses telling me to f*%k off and all this offensive personal stuf…im thinking to my self…did i do the right thing by sending that sms??? i kinda feel bad in a way but angry