OrekaTR is here to save you. The top of the line software, although a bit complex can be learned with a little bit of dedication. It's great at handling VoIP calls so consider your problems solved when using OrekaTR. it gives you all the perks you expect, namely, cloud services, livechat support and makes your webpages look rich. The one thing that'll take your attention away from OrekaTR is its price tag which cannot usually be afforded by smaller organisations.
I understand dedicating finances for softwares can upset financial calculations but no good thing comes cheap. If you cannot afford it, another option is CALLN. CALLN is perfect for telemarketing companies and with a few tweaks can be used by everyone. It costs 14$ a month/user so you can probably dedicate finance to the software.