WiFi worse with new WiFi guaranteed hub

[MBizzle]

I got the new Wi-Fi guarantee hub this week thinking that it would improve the reach within my house, however and reading the small print it seems it only gives you guaranteed connection speed, it doesn't give you guaranteed signal strength. Because of where the connection comes into the house We're not able to move the router to a different location, but we do do have multiroom devices in two rooms that seem to work ok.  Any help would be appreciated. 

[TimmyBGood]

@MBizzle 

Sky loans wireless booster hardware free under the terms of the 'WiFi Guarantee' element of the legacy 'Broadband Boost' add-on and the 'Enhanced Wall to Wall WiFi Guarantee' part of the 'WiFi Max' subscription supplement: they don't otherwise provide or sell boosters except to resolve issues with Sky Q. Phoning Sky to go through a telephone diagnosis is required to have a booster or pod allocated to the account. Inevitably some  Sky booster hardware has leaked onto a certain auction site and elsewhere online, but Sky won't offer support with using these. 

Confusingly the default 'Wall to Wall WiFi Guarantee' bundled with all new Sky Broadband orders where Boost or Max is not added by the customer doesn't actually provide booster hardware, and is essentially a sales lead generator for the supplements mentioned above plus a one month broadband subscription refund.