The word 'wast located' does not exist in the English language. However, if you meant 'was located,' then the antonyms for this phrase would likely be 'was lost' or 'was displaced.' If something was not located at all, then the antonyms would be 'wasn't there,' 'was absent' or 'was missing.' Alternatively, if you were referring to the verb 'to waste' and its past participle, then the antonyms for 'wasted' would include 'conserved,' 'utilised,' 'efficiently used,' 'productively spent' or 'saved,' depending on the context.