Adafruit Soundboard help

Hi everyone I am relatvely new to arduino, I can get by and keen to progress. I am working on a project that I need help with. It involves a push button, Oled Screen and a Adafruit sound board. Basically I am trying to run the sound board via serial and I can`t get both the screen and the sound board to both work at the same time. 

I want the Oled to display the track number which increments with a short press on the push button and if there is a long press the soundboard plays the track assigned to that number. the sound board has a activity pin (ACT) which is low when a track is being played which I am monitoring and if there is a track playing a short or long press of the button will stop the track.

My problem is getting the Oled and sound board to work at the same time. I thought it would work as the Oled is I2C and sound board is serial. The code compiles but neither the screen or sound board work. I have included my code bellow incase I have done something wrong or it might just not be possible, I don't know??? I would greatly appreciate and help you can give me with this problem. Thanks

#include "Wire.h"
#include "OneButton.h"
#include "Adafruit_SSD1306.h"
#include "SoftwareSerial.h"
#include "Adafruit_Soundboard.h"

#define ButtonPin 2
#define OLED_RESET 1
#define SFX_RST 4
#define SFX_TX 5
#define SFX_RX 6
#define Act_Pin 13

OneButton button(ButtonPin, true);
Adafruit_SSD1306 display(OLED_RESET);

SoftwareSerial ss = SoftwareSerial(SFX_TX, SFX_RX);
Adafruit_Soundboard sfx = Adafruit_Soundboard(&ss, NULL, SFX_RST);

byte Display = 1;
byte DisplayOld = 0;
bool Act;

void setup() {
button.attachClick(singleClick);
button.attachLongPressStop(longClick);
Wire.begin();
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
pinMode (Act_Pin,INPUT_PULLUP);
ss.begin(9600);
}

void loop() {
Act = digitalRead (Act_Pin);

button.tick();
delay(10);

if (DisplayOld != Display) {                                                    // Run Screen if display has changed
Screen();}
if (Display>8){
Display = 1;}}

void singleClick() {                                                               // increment Display - if Track playing stop track
if (Act == true){
Display ++;}
if (Act == false) {
sfx.stop();}}

void longClick() {                                                                 // Play Track,
if (Act == true){
sfx.playTrack((Display));}
if (Act == false) {
sfx.stop();}}

void Screen() {                                                                   // Display Screen
display.setTextColor(WHITE);
display.clearDisplay();
display.setTextSize(1);
display.setCursor(55,0);
display.print("Tune");
display.setTextSize(2);
display.setCursor(35,15);
display.print("Track ");
display.print(Display);
DisplayOld = Display;}