Well, it all depends on the usuage level and tariff of the provider. My own calculations are as follows for Iberdrola, and I live not a long way from Calpe:-
Potencia (2.2); 60days at 0.115187 per day is €6.91122
Usage 493KWh at 0.124107 per KWh is €61.18475
Electricity tax at 4.864% * 68.09597 * 1.05113 gives €3.48154.
Service is 60days at 0.01874 per day or €1.1244
The total of the above is €72.70191
VAT (IVA) at 21% is €15.2674
Total is therefore €87.96931.
You will need to take into account the markup applied by the owner of the flat!
I do not know the rate for higher Potencias, but I would have thought that 2.2 would be enough for a 1 bed flat, but the addition of AC or underfloor or other high-use of heating will impact on the potencia contracted.
My view is that you may well have been ripped off!