When any plant gets badly dehydrated the soil becomes "hydrophobic," like a dry sponge and resists absorbing water. The solution is not a larger pot but letting the pot sit in water for a few hours to re-saturate the soil and then never letting it get that dry again.
Your plant's recovery will depend on how badly the roots were damaged by the dehydration, by the repotting, and any watering issues subsequently. The more light it gets the better it will do. Keep the soil damp, but not wet.
