If your temp is 29°C you need to lower that asap. Try to aim for lower 20's man.
Also like I said before buy some soil from a Hydro shop specifically for our 'Kind' of plants.
If you can't get that, get some soil for 'seedlings' and mix some perlite in with it.
Also start your seedling in a very small pot the size of a cup. Water it very very lightly once every 2-3 days.
Basically you want low comfortable temperatures, very light soil specifically for seedlings thats nice and aerated (with perlite) and not too much water, just moist but not soaking wet.
If you do that you really can't fail. Oh... and leave it alone