The Blues’ replacements sealed the points and Adam Cunnington and Moses Emmanuel secured a 2-0 win at Hemel Hempstead.
Last weekend Tamplin suggested his future lies away from the National League South club following defeat to Woking.
Then last night he revealed former manager Harry Wheeler has rejected the chance to return having been sacked after losing just once. The owner has held his hands up to “a big mistake”.
“We could have come in two or three goals down at half-time, Hemel were by far the better side and we needed to make some changes,” Tamplin said.
“As a managerial three we couldn’t agree on what changes to make and in the end we went with what I wished, which was good of them to back me. We went with a back three and it worked. Our two subs scored and it made all the difference. They all done me proud.
“I put myself out there and it was a risk. I made a mistake letting Harry Wheeler go. I have tried to get him back, but he doesn’t want to come back - I understand that. I have apologised to him in person, I have sacked him and I shouldn’t have done. I will learn from it and it won’t happen again.
“Until I meet an investor who is willing to take this club through the leagues I can’t leave,” he added.
“I made a promise to the fans, and it looks as though I’m going to stay because I can’t find anyone who is willing to put their hands in their pocket.
“I won’t hand the club to anyone who will let the club sit in this league and not continue the dream that I have sold.
“If in three weeks I haven’t found someone, then I will see the job through.”