I have a 8ft vynal inground pool. I drained it almost all the way with the exception of 2ft which keeps leaking in through the hole in the liner located at the drain. I have put it on waste but it will not drain all the water,

so i purchased c sump pump and cant seem to get it drained enough for me to patch the vynal. Do you have any suggestions? What kind of a patch kit I need and maybe some guidance on how to patch this. Most impaortantly how to stop the drainage under the liner that keeps seeping in.