Hi and welcome,
Your history says you have undergone trauma of front teeth in the childhood, you started with root canal treatment
but did not complete it anf dint take any dental follow ups . As you have mentioned about the hole in the tooth , i suspect your front tooth has broken or undergone attrision to the level of gums and hole drilled for root canal is exposed. In this condition i would suggest you to get and x ray
done for your tooth which will decide the further treatment plan.
your tooth is dead or nonvital , so if x ray shows good bone support for the tooth you can complete your root canal and get a post and core build up done for your tooth. and if the tooth is infected at roots , get the tooth removed and replaced in position by a prosthetic tooth either an Implant or a connecting bridge. these all are treatment options for you i hope you will consult a dentist
and talk to him about this. take care