Hi Jenny,
good choice of small car in the panda
with NO hot air there are 2 potential issues issues,
1, no hot water getting the the Matrix ( radiator) that warms the air inside the car = usually down to an air-lock
2, broken linkage inside the heater box, so the lever is stuck on COLD AIR request
the
#1 = airlock is the most comon, and thankfully the simplest fix,
with the engine cold,
have heater control in car to HOT
look for some little plastic screws built into the hoses behing the airfilter box,( BLACK plastic + round headed)
unscrew one to see what it does..!!
slacken the 2 of them off,
then top up your antifreeze in the Radiator expansion tank /tube to the MAX mark, replace Rad.Cap.
undo the 2 bleed screws around 1 turn EACH = then start the engine,
looking under the bonnet again you will see water start to trickle from these screws, as they dribble close the screw..!!,
depending how much air is in the system this may take a few minutes before it dribbles,
beware of things getting HOT around you,
NO LONG scarves= etc, to get caught in the mechanicals,
Charlie