mispunctuation
/ˌmɪspʌŋ(k)tʃʊˈeɪʃn/ /ˌmɪspʌŋ(k)tjʊˈeɪʃn/noun
Incorrect or faulty punctuation; (occasionally) an instance of this.
Origin
Early 19th century; earliest use found in Robert Southey (1774–1843), poet and reviewer. From mis- + punctuation.