All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
The best means to get rid of the jinn is to be steadfast on the obedience of Allaah and to refrain from disobeying him. One should also be persistent on reciting the morning and evening mention and other legislated mention of Allaah and perform Ruqyah.
Furthermore, you should know dear brother, that being lazy in performing the prayer is one of the characteristics of the hypocrites and it is one of the ways of the devil by which he controls and misguides the person. Therefore, you should perform the prayer at its prescribed fixed time with humbleness and submissiveness and you will find its results: peace of mind and tranquillity, Allaah willing.
For more benefit, please refer to Fataawa 84235 and 81555.
Similarly, you should fast the obligatory fasting like Ramadan unless you have a sound reason for not fasting, like being unable to fast due to sickness, or because of travelling.
For more benefit on the ruling of breaking the fast without a sound reason, please refer to Fatwa 83368.
We ask Allaah by all His Beautiful Names and Attributes to cure you from every disease and grant you protection from the whispers and lures of the devil.
Finally, for more benefit on how to treat possession by the devil and getting rid of his whispers, please refer to Fataawa 88124 and 89884.
Allaah Knows best.