UK-Based Inbound & Outbound Call Centre Setup

I'm seeking professional assistance to establish a cost-effective inbound & outbound call centre system for two UK-centric campaigns focused on customer support.

Key Setup Requirements:
- Two dedicated landline phone numbers for each campaign
- Configuration for three agents
- Full inbound and outbound call capability
- Integration of Interactive Voice Response (IVR) system with multi-level menus and call queuing features
- DTMF Support for monitoring client interactions
- Efficient call routing for both UK and Ireland
- Recommendations for a reliable and cost-effective VOIP provider as I'm currently without one
- Custom branding implementation with provided assets
- Compatibility with SIP App for mobile calls, ensuring DTMF feature is available on this platform

The ideal freelancer for this project should have:
- Proven experience in setting up call centre systems
- In-depth knowledge of VOIP services, focusing on cost-effectiveness
- Familiarity with customer support campaigns
- Skills in IVR system configuration
- Ability to implement custom branding
- Expertise in SIP App configuration
- Strong communication skills for clear project updates

Please provide your capabilities, pricing, and estimated setup time. I'm looking forward to your proposals.