Hello i have been student at HTW since march 2019, i was unable to pay the tuition fee and got expelled, afterwards i tried to get Arbeitserlaubnis so that i could finance my studies but it was also rejected, since march 2020 i got Grenzübertrittsbescheinigung (GÜB), it was also prolonged in July till Oktober 23, i had bern suggested to go Duldung, i wonder which type of Duldung should i apply for and also does it help. For information i came here in december 2014 as language student in august 2016 i had an accident