If I were you I would return it and buy the Nokia C3 Pink. There’s a list of retailers where you can get it on this page: http://www.mobilephonedealscompare.co.uk/payg.asp?search=&hs=nokiac3pink

Sony Ericsson Vivaz Pro:
Pros:
-has an actual qwerty keyboard that slides out
-3G is not mandatory, meaning you don’t have to pay a (about $50) data plan each month, WiFi is built in
-easier to get used to if you currently have a non-smartphone, when you answer a call, you just press the green — or the red — to answer/decline, with the xPeria, you have to drag the bar to unlock
-camera is 5.1 megapixels, the xPeria x8′s is 3.2 megapixels, the xPeria x10′s is 8.1 megapixels
-HD video recording
-has five different keyboards to type on: actual texting keyboard, touchscreen qwerty keyboard, alpha numeric keyboard, handwriting keyboard, and mini qwerty keyboard.

Cons:
-not a smartphone
-resistive touchscreen (you may have to tap a bit harder than with the xPeria, but the xPeria needs heat to react
-only comes in white or black
-needs 3G or WiFi to access online ringtones, applications, and Internet
-smaller scren (unless you like small screens)

Shared Features:
-both have WiFi
-both have a camera
-comes in more than one colo(u)r

Sony Ericson xPeria x8
Pros:
-Android Market has more applications for this phone than the Vivaz Pro, I don’t think you can download Android Market apps from the Vivaz Pro (The App Store, for iPhone, iPod Touch, and iPad stil have more though. Some free games for the Android Market have ads, they’re not annoying ones though, just at the top corner of your screen.)
-is a smartphone
-I think it has extra colo(u)rful faceplates for the back, the Vivaz Pro does not
-capacitive touchscreen is easier to tap, however you will need heat for it to react
-bigger screen (unless you like small screens)

Cons:
-monthly data plan (about $50) for the 3G service that is mandatory on the smartphone
-the x8 only has a 3.2 megapixels camera, the Vivaz Pro has a 5.1 megapixels one, and the xPeria x10 has a 8.1 megapixels camera
-one keyboard to type on: the touchscren qwerty keyboard

I hope I helped because I spent half an hour on this. Good luck.