Graphic design companies in the United Kingdom focus on visual communication to help businesses build and convey their brand identity. These specialists create a range of visual materials, including logos, branding guidelines, print collaterals (brochures, leaflets, packaging), and digital assets such as website, app, and social media graphics.  

Ultimately, their work aims to make a business's communication memorable and visually engaging for their target audience. 

The typical timeline for graphic design services varies greatly based on the project's complexity. Namely, simple, single digital assets like social media graphics take a few hours to days, while intricate print/brand collaterals or full website/app designs may take several weeks or even a month.  

Other key factors that can influence the duration include the project scope, the number of revisions required, the designer's experience, and the client's promptness in providing necessary information and feedback. 

A graphic design service package typically covers a specific list of deliverables, which could include several logo variations, a defined color palette, and typography selection, all summarized in a basic brand style guide. Depending on the package, it might also cover additional items like social media templates, business card designs, or specific print layouts. 

A United Kingdom graphic design agency's portfolio should be a curated selection of their best work that effectively demonstrates their versatility and creative process across different mediums. Case studies are the key element you should look for, as they showcase a variety of visual collaterals, presented with clear descriptions that explain the initial brief/request, the agency's approach, and the final result.  

The resolution for dissatisfaction typically depends on the terms outlined in the initial contract or service agreement. Most professional agencies offer a revision policy that allows for a set number of changes to the design work at no extra cost to ensure the final product meets the expectations.  

If fundamental dissatisfaction persists, you may be entitled to a partial refund or cancellation of the remaining work, although this varies, so it's important to review the cancellation and refund clauses before starting the project.