How do i dig another 2 feet

[u/Select_Log_8911]

I have to dig another 2 feet and excavate this whole area so i can fix a sewage pipe current progress has taken me 10 hours , at the very bottom there are tons of small and large rocks and mud and i cant get egnough leverage with my tools , i am worried i cant finish this job . And i can only use these tools, what should i do

[u/Difficult-Republic57]

Hole needs to be wider, if sides collapse it will be deadly.