Complex sentence: On March 20,2001, the station changed its call letters to the current WMDO-CA (despite its callsign, WMDO has never been affiliated with Telemundo, which is seen locally on WZDC-CD).
Split into simpler sentences: On March 20,2001, the station changed their call letters to WMDO-CA, which remain the call letters to this day. Despite its calls resembling so, WMDO was never affiliated with Telemundo (which is seen locally on WZDC-CD).