Write a review Your name* Your e-mail* (Not for publication) Rating ★★★★★ Excellent ★★★★☆ Very good ★★★☆☆ Average ★★☆☆☆ Poor ★☆☆☆☆ Terrible Your review * * — Required information SIP SERVICES INTERNATIONAL LTD ← View details 29th Floor, ONE CANADA SQUARE, CANARY WHARF, LONDON E14 5DY, United Kingdom, London, England