I don't want to sound harsh.. but your account already got "hacked" multiple times.
You might consider changing your habits when using a computer or maybe completely refrain from them ?
Obviously you are not able to have somewhat reliable security measurements (which really only means: don't be a retard and don't download every software).
That can be done if the OP is still using the same device that might have been infiltrated by a virus or malware. Someone will fall into the same hole if he makes the same mistakes and continues to do his habits.
Leaving old habits and not using the same device again is what the OP must do if one day the account returns.