Welcome to GTAW, first of go read up on the rules again, understanding and following them is key to make it on the server, here is the rule that got you kicked;
17) Advertisement Rules
The advertisement system is there to assist in the creation of roleplay, and assist in the trade of assets and services. Illegal advertisements are not allowed even if the intent behind them is hidden or attempted to be hidden IC. Players are expected to use other IC methods to distribute illegal items or services. Gambling and card games may only be advertised by businesses that have the licensing to host these games. Private games may be organized using other methods.
Regular advertisements (/ad) is for general advertisements that are not associated with businesses or companies.
The following are considered acceptable examples of using /ad:
buying and selling of properties, businesses, vehicles or items of value;
advertisement of events that are not associated with a business or company;
advertisement of legal services.
You may NOT use /ad for the following under any circumstances;
looking for work ads, which can be put on the forums;
ads looking for roommates;
illegal advertisements of any kind;
ads selling or buying legal firearms or other legal weapons outside of a licensed business;
asking for rides;
Company ads (/cad) are used by companies to advertise recruitment, events, when the companies are opening their businesses and other things associated with companies.
Business ads (/bad) are a feature for donators used to place a blip on the map to mark a business that is currently open. /bad should only be used for this purpose.
You must pick one type of advertisement (/ad, /cad or /bad) and stick to it. Players may not use other advertisement types to get around the scripted cooldown. Players also may not use other players to avoid cooldowns.
Advertisements must not be spammed. Players are expected to be courteous when advertising. Posting several ads for the same business in a short period of time is considered a breach of this rule.
When advertising, ads must only use fully in-character terms. Selling cars that are "maxed out", or using similar terms such as fully upgraded or decked out, is considered to be a breach of this rule. You should describe it in a proper IC way rather than using "maxed out" to tell other players that it cannot be upgraded any further by the script. For properties, default interiors and fully mapped interiors should not be advertised differently. A singleplayer or GTA Online interior that is furnished is still considered furnished. Adding additional objects to one of those interiors or making an interior from scratch should not be the factor to determine if something is furnished or not when advertising.
Examples of breaking the rule:
making an advertisement to purchase firearms;
advertising the sale of knives or lock picks when the person selling does not have a licensed business to do so;
advertising the selling of marijuana;
making an advertisement looking for a date or along the lines of "a fun time";
making an ad about looking for an eagle from the desert, implying you're looking for a Desert Eagle;
advertising the search of a hitman to take someone out.