in the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and df congruent to bd. point c is the point of intersection between ab and bd while point e is the point of intersection between ag and df. prove δabc ≅ δgfe.

what i have right now is;
∠b ≅ ∠f given
cb ≅ ef df ≅ bd, (given), df - ed ≅ bd - cd

i'm trying to prove ∠dce ≅ ∠acb and ∠dec ≅ ∠gef so that i can use asa to prove δabc ≅ δgfe, but i don't know how to do that and this is very urgent so